Full-color organic electroluminescent display device

Abstract

This invention discloses a full-color organic electroluminescent display device, belonging to the field of optoelectronic display technology. The full-color organic electroluminescent display device of this invention includes independently controlled red, green, blue, and cyan light-emitting devices. Each red light-emitting device includes a red light-emitting layer, each green light-emitting device includes a green light-emitting layer, each blue light-emitting device includes a blue light-emitting layer, and each cyan light-emitting device includes a cyan light-emitting layer. Each red light-emitting layer includes a red light host material and a red light guest material; each green light-emitting layer includes a green light host material and a green light guest material; each blue light-emitting layer includes a blue light host material and a blue light guest material; and each cyan light-emitting layer includes a cyan light host material and a cyan light guest material. At least one of the red, green, blue, and cyan light-emitting layers contains a sensitizing material. This full-color organic electroluminescent display device of this invention improves color space coverage while achieving high efficiency and long lifespan.

Description

Technical Field

[0001] This invention relates to a full-color organic electroluminescent display device, belonging to the field of optoelectronic display technology. Background Technology

[0002] The visible spectrum of nature constitutes the largest color gamut space of all colors visible to the human eye. The color gamut of a full-color display device refers to the range of colors that can be expressed by the light-emitting pixels that make up the display device, under the most exhaustive arrangement and combination. In color perception research, the CIE 1931 color space is one of the first color spaces defined mathematically, another being CIE 1976. Traditional display devices use the three primary colors (red, green, and blue), achieving full-color display through combinations of these three colors at different brightness levels. Currently, mainstream display products on the market include three main color gamut standards: Rec.709 (also known as BT.709), DCI-P3, and BT2020. The CIE international association has developed the CIE-xy horseshoe chromaticity diagram, which visually represents all the colors in nature. For traditional OLED displays, the larger the area of ​​the triangle formed by the lines connecting the RGB primary colors, the larger the color gamut range of the display device. However, in the CIE-xy chromaticity diagram, the color gamut coverage of 100% of the NTSC RGB three primary colors is only 47.6%. Even BT2020's color coverage in the CIE1931 chromaticity diagram is only 63.7% of real-world colors, while Rec709 is only 33.7%. This indicates that many real-world colors are still difficult to fully reproduce in full-color displays. Therefore, driven by the future demands for high-definition displays and high image quality, developing disruptive and highly competitive OLED display technologies is expected to help OLED display products establish a differentiated competitive advantage.

[0003] Prior art CN106356390A discloses an organic light-emitting display device comprising four types of pixels, including a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. The first sub-pixel includes a first light-emitting layer emitting a first color light, the second sub-pixel includes a second light-emitting layer emitting a second color light, the third sub-pixel includes a third light-emitting layer emitting a third color light, and the fourth sub-pixel includes a fourth light-emitting layer emitting a fourth color light. The emitted first, second, third, and fourth color lights are different from each other. The first light-emitting layer, the second light-emitting layer, and the fourth sub-pixel are all different from each other. At least one of the third and fourth light-emitting layers emits hysteresis fluorescence, specifically including one of red, green, blue, yellow, cyan, and magenta light, which can broaden the color gamut. However, the device efficiency and lifespan are very poor. Among them, red, green, and blue light devices are relatively mature. The efficiency and lifespan of cyan pixel devices have become important factors affecting the performance of full-color display devices. Compared with red light devices, cyan devices often exhibit insufficient lifespan. This leads to problems such as screen burn-in or reddish screen color due to the rapid degradation of cyan pixels and insufficient screen color stability during long-term use.

[0004] Furthermore, from the perspective of visual perception characteristic curves, the color light around 555nm has the optimal visual brightness. Compared to 555nm color light with the same number of photons, the visual brightness of 460nm color light is only 6% of that of 555nm color light, while the visual brightness of 490nm color light is 3.47 times that of 460nm color light. Therefore, in traditional RGB three-primary-color displays, to improve the brightness of the display, the brightness of all three primary colors needs to be improved simultaneously. In OLED full-color displays based on RGB three-primary-color, from the perspective of visual perception curve characteristics, even with the same number of photons, blue light is the least perceptible to human vision. This results in blue light pixel devices having lower luminous efficiency than red and green light. Blue light pixel devices are often the most power-consuming pixels among the three primary colors, with blue pixels often accounting for half of the power consumption of a full-color display screen. Therefore, further improving the luminous efficiency of blue light pixel devices is an effective means to achieve low power consumption of the display. However, due to the limitations of blue light technology, significantly improving the efficiency and brightness of the blue light devices that make up the display screen presents a huge challenge. Summary of the Invention

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a full-color organic electroluminescent display device. This full-color organic electroluminescent display device improves spatial color coverage while achieving low power consumption, high efficiency, and long lifespan.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a full-color organic electroluminescent display device, comprising independently controlled red light-emitting devices, green light-emitting devices, blue light-emitting devices, and cyan light-emitting devices. The red light-emitting device includes a red light-emitting layer, the green light-emitting device includes a green light-emitting layer, the blue light-emitting device includes a blue light-emitting layer, and the cyan light-emitting device includes a cyan light-emitting layer. The red light-emitting layer includes a red light host material and a red light guest material, the green light-emitting layer includes a green light host material and a green light guest material, the blue light-emitting layer includes a blue light host material and a blue light guest material, and the cyan light-emitting layer includes a cyan light host material and a cyan light guest material. At least one of the red, green, blue, and cyan light-emitting layers contains a sensitizing material, and the guest material in the light-emitting layer containing the sensitizing material is a fluorescent light-emitting material.

[0007] Under organic electroluminescence conditions, holes and electrons recombine on the host material to generate excitons. The exciton-sensitized material utilizes its strong spin coupling effect to significantly improve the utilization rate of triplet excitons, and then transfers energy to the guest material through efficient long-range energy transfer. Finally, the fluorescent luminescent material emits light rapidly. By using three materials with different properties, namely the host material, the sensitized material, and the guest material, each of them independently undertakes the functions of electron-hole recombination, effective exciton generation, and luminescence in the luminescent layer. This can effectively reduce the triplet exciton concentration and fundamentally improve the stability of the device.

[0008] For organic electroluminescent devices based on the Minhua system, there are more energy transfer channels from the excitation energy to the final electroluminescence of the device. These channels include those from the host material to the narrow-spectrum luminescent guest material and from the Minhua material to the narrow-spectrum luminescent guest material. This multi-channel and diversified energy transfer is more conducive to achieving high device efficiency.

[0009] Furthermore, at least one of the red, green, and cyan light-emitting layers contains a sensitizing material.

[0010] Preferably, at least one of the green and cyan light-emitting layers contains a sensitizing material. More preferably, the cyan light-emitting layer contains a sensitizing material.

[0011] Furthermore, the red light-emitting layer contains a red light-emitting material that is either a fluorescent or phosphorescent material; the green light-emitting layer contains a green light-emitting material that is either a fluorescent or phosphorescent material; the blue light-emitting layer contains a blue light-emitting material that is either a fluorescent or phosphorescent material; and the cyan light-emitting layer contains a cyan light-emitting material that is either a fluorescent or phosphorescent material.

[0012] Furthermore, the green light-emitting layer contains a green light-emitting material that is a fluorescent light-emitting material, and the cyan light-emitting layer contains a cyan light-emitting material that is a fluorescent light-emitting material.

[0013] Furthermore, the cyan guest material is a fluorescent luminescent material.

[0014] Furthermore, the CIEx coordinate value of the cyan light-emitting device is smaller than that of the green light-emitting device.

[0015] Furthermore, the CIEx coordinate value of the cyan light-emitting device is smaller than the CIEx coordinate value of the blue light-emitting device.

[0016] Furthermore, the light emitted by the cyan light-emitting device has a CIEx coordinate of less than 0.1 and a CIEy coordinate of less than 0.5, more preferably a CIEx coordinate of less than 0.08 and a CIEy coordinate of less than 0.44, and even more preferably a CIEx value between 0.04 and 0.07 and a CIEy value between 0.24 and 0.42.

[0017] In the full-color organic electroluminescent display device of the present invention, the red light-emitting device emits visible light with a peak value of 600-700nm, and the green light-emitting device emits visible light with a peak value of 500-550nm. Preferably, the green light-emitting device has a CIE (Crystal Element Identification) of 600-700nm. Y If the value is greater than 0.76, the blue light-emitting device emits visible light with a peak value of 440-470nm, the cyan light-emitting device emits visible light with a peak value of 470-500nm, and preferably the cyan light-emitting device emits visible light with a peak value of 475-490nm.

[0018] In the full-color organic electroluminescent display device of the present invention, the spectral half-width of the red light guest material, green light guest material, blue light guest material and cyan light guest material is less than 40 nm.

[0019] Furthermore, the spectral half-width of the cyan guest material is less than 40 nm, preferably less than 30 nm, and more preferably less than 20 nm.

[0020] The narrow spectral characteristics of cyan guest materials can maximize the color gamut. We compared a typical pyrene-based blue dye (47 nm half-width) with a boron-nitrogen multiple resonance narrow spectral material (25 nm half-width). (See attached image.) Figure 8The image shows a comparison of the photoluminescence (PL) spectra of typical pyrene-based blue light-emitting materials doped with the same substrate. By redshifting both spectra by 20 nm, two cyan light-emitting device spectra can be obtained. Based on the EL spectra of bottom-emitting organic light-emitting devices (OLEDs) of these two materials, and under the same optical design, the CIE coordinates of their top-emitting OLEDs are simulated and calculated. These CIE coordinates are (0.062; 0.34) and (0.05; 0.36), respectively. From the comparison of the top-emitting and bottom-emitting spectra of these two blue light-emitting materials, a narrower bottom-emitting spectrum can obtain a narrower top-emitting spectrum. At the same time, the color purity of the top-emitting device is also higher, and its CIE color coordinates are more likely to approach the outer contour of the CIE1931 color space—horseshoe gamut. It can be seen that full-color displays based on the four primary colors of red, green, blue, and cyan will have a higher color gamut. Based on the exact same optical design, the aforementioned pyrene-based blue light dyes and narrow-spectrum boron nitride blue light dyes, under the same optical design, have a difference of 20% in the efficiency improvement ratio from bottom emission to fixed emission device. In other words, the fixed emission device of the narrow-spectrum boron nitride blue light dye with the same internal quantum efficiency has higher luminous efficacy and can obtain higher brightness at the same current density. High efficiency also means low power consumption and higher brightness of the display device.

[0021] Another advantage of using narrow-spectrum materials is that they can achieve high energy transfer efficiency. This is because narrow-spectrum luminescent materials have narrower Stokes shifts and often have higher molar absorbance. These characteristics are conducive to the efficient transfer of excitation energy generated by the recombination of positive and negative charges to the final narrow-spectrum luminescent material, thus making it easier to achieve high device efficiency.

[0022] Furthermore, the red light host material comprises a first red light host and a second red light host, and an excitocomplex is formed between the first red light host and the second red light host; the green light host material comprises a first green light host and a second green light host, and an excitocomplex is formed between the first green light host and the second green light host; the cyan light host material comprises a first cyan light host and a second cyan light host, and an excitocomplex is formed between the first cyan light host and the second cyan light host.

[0023] Furthermore, the red light-emitting device, green light-emitting device, blue light-emitting device, and cyan light-emitting device are single-stacked or series-connected feature structures.

[0024] Furthermore, the areas and shapes of the red, green, blue, and cyan light-emitting devices may be the same or different from each other.

[0025] Furthermore, the red, green, blue, and cyan light-emitting devices are not entirely the same in terms of area and shape.

[0026] Furthermore, the full-color organic electroluminescent display device also includes an independently controlled yellow light-emitting device, which comprises a yellow light-emitting layer, and the yellow light-emitting layer comprises a yellow light host material and a yellow light guest material.

[0027] Furthermore, at least one of the red, green, blue, cyan, and yellow light-emitting layers contains a sensitizing material.

[0028] Furthermore, at least one of the red, green, cyan, and yellow light-emitting layers contains a sensitizing material.

[0029] Furthermore, the yellow light-emitting device emits visible light with a peak value of 550-580nm, preferably with a peak value of 560-570nm.

[0030] Furthermore, the half-width of the spectrum of the yellow light-emitting device is less than 40 nm, more preferably less than 30 nm.

[0031] Furthermore, the yellow light-emitting device emits light with CIEx coordinates of 0.45±0.1 and CIEy coordinates of 0.5±0.1.

[0032] Furthermore, the red, green, blue, cyan, and yellow light-emitting devices are either single-layer or series-connected feature structures.

[0033] Furthermore, the areas and shapes of the red, green, blue, cyan, and yellow light-emitting devices may be the same or different from each other.

[0034] Furthermore, the sensitizing material is a thermally activated delayed fluorescence sensitizer or a phosphorescent sensitizer.

[0035] Furthermore, the phosphorus photosensitizer is a complex containing Ir or Pt.

[0036] The final luminescent carrier of phosphorescent photosensitive devices is a narrow-spectrum fluorescent material, such as boron-nitrogen-based multiple resonance materials and Bodipy-based narrow-spectrum materials.

[0037] Furthermore, the thermally activated delayed fluorescence sensitizer is a thermally activated delayed fluorescence material containing a donor and acceptor framework.

[0038] The development of two technical routes—thermally activated delayed fluorescence (TADF) materials and phosphorescent materials containing noble metals such as iridium and platinum—is closely related to the development of sensitizers and fluorescent luminescent materials themselves. Furthermore, sensitization technology based on TADF materials is defined as TADF fluorescence-sensitized fluorescence technology (TSF), while sensitization fluorescence technology based on phosphorescent materials is defined as phosphorescence-assisted sensitization technology (PTSF).

[0039] TADF materials, theoretically capable of achieving 100% exciton utilization in the absence of heavy metal atoms, are considered the "third generation" of luminescent materials after fluorescent and phosphorescent materials. TADF materials can simultaneously emit light using S1 and T1 states generated under electro-excitation. 25% of the S1 states can directly emit transient fluorescence (PF) through radiative transitions, while due to its small ΔEST, 75% of the T1 states can return to S1 through reverse intersystem crossing (RISC) under the influence of ambient heat, and further emit delayed fluorescence (DF) through radiative transitions from S1 to S0, thus achieving 100% exciton utilization. However, because TADF materials emit light in a charge-transfer state (CT), resulting in a broad emission spectrum and low color purity, they struggle to meet the demands of wide color gamut displays, limiting their development and application. In 2014, the inventors first proposed a novel luminescence mechanism using thermally activated sensitized fluorescence (TSF). This mechanism uses TADF material as the host or sensitizer of a traditional fluorescent dye, combining the high exciton utilization of TADF material with the rapid excitation energy transfer of specific narrow-spectrum fluorescent materials. This overcomes the drawbacks of using TADF material as the luminescent dye and promises to enable the fabrication of high-efficiency, high-color-purity, and high-stability OLED devices. The phosphorescence-assisted thermally activated sensitized fluorescence (PTSF) strategy introduces a phosphorescent material with intermediate excited-state energy as an auxiliary sensitizer on top of the classic TSF mechanism. Benefiting from the triplet-triplet dexter energy transfer (DET) between thermally activated delayed fluorescence (TADF) and the phosphorescent material, the triplet state of TADF is effectively converted, breaking the singlet-triple-singlet exciton cycle of the TSF system. This achieves 100% exciton utilization while significantly shortening the triplet exciton lifetime, thereby improving the efficiency and stability of the device at high brightness.

[0040] Compared to TADF-sensitized fluorescence technology, phosphorescence sensitization technology offers significant advantages in research and development. Thanks to the long-term accumulation and investment in the industrialization of host and guest phosphorescent materials within the OLED materials industry, this technology has reached a high level of development. It also greatly enriches the sources of host materials and phosphorescence sensitizing materials used in phosphorescence sensitization technology research and development, thereby improving the efficiency of phosphorescence sensitization system development and promoting continuous device optimization.

[0041] Regardless of the specific material combination used in sensitized OLED devices, the fundamental properties of the final luminescent material have a significant impact on the final device formation. Whether using traditional iridium-based or platinum-based phosphors, the spin-orbit coupling between multiple ligands and the central heavy atom makes it difficult to achieve extremely high spectral density, let alone compress the shoulder peak of the emission spectrum to a very low level. In recent years, a novel type of multiple resonance thermo-induced delayed fluorescence (MR-TADF) material has attracted widespread attention in the OLED display industry due to its ability to effectively solve the problems of color purity and efficiency. Its rigid conjugated framework can suppress the structural relaxation of the excited state and the vibrational coupling between the excited and ground states, resulting in a narrow spectral half-width. Currently, MR-TADF material systems generally include four types: boron-oxygen, boron-nitrogen, carbonyl-nitrogen, and indole-carbazole. Compared to the other three types, boron-nitrogen has a stronger structural modification, a narrower half-width, and strong thermo-induced delayed fluorescence properties. Therefore, this paper mainly discusses boron-nitrogen-based MR-TADF materials, and studies their molecular structure and photoelectric properties from the aspects of the influence of aniline and carbazole peripheral substituents on the multiple resonance core, the regulation of the relative position and number of boron and nitrogen atoms, and the influence of heteroatom introduction on MR-TADF materials.

[0042] For MR-TADF materials to achieve good lifetime, their ΔEst value cannot be too high. Only when the luminescence-deactivation lifetime is sufficiently short can good OLED device application lifetime be expected. However, when ΔEst is too small, its triplet emission cannot be fully utilized, or its luminous efficacy may be affected. But by using TADF-sensitized or phosphorescently sensitized narrow-spectrum MR-TADF materials, not only can good luminous efficacy be achieved, but also a good device lifetime.

[0043] Furthermore, at least one of the red light guest material, green light guest material, blue light guest material, and cyan light guest material is a boron-containing fluorescent material.

[0044] Furthermore, one of the red light guest material, green light guest material, blue light guest material, and cyan light guest material is an Ir-type or Pt-type phosphorescent material.

[0045] Furthermore, in the full-color organic electroluminescent display device, the color gamut area composed of the red light-emitting device, the green light-emitting device and the cyan light-emitting device can directly cover the target white field of the display device, wherein the light-emitting component of the green light-emitting device accounts for no more than 30% of the entire white field spectral component.

[0046] Furthermore, in the full-color organic electroluminescent display device, the color gamut area composed of the red, green, blue, and cyan light-emitting devices can directly cover the target white field of the display device. More preferably, the light emitted by the cyan light-emitting device is mixed with the light emitted by the red light-emitting device in a certain proportion to directly form the white field of the display device. The light emitted by the cyan light-emitting device, together with the light emitted by the red, green, and blue light-emitting devices, constitutes the multi-color primary colors of the full-color organic electroluminescent display device and forms a polygonal color gamut coverage.

[0047] Furthermore, in the full-color organic electroluminescent display device, the arrangement of the red light-emitting device, green light-emitting device, blue light-emitting device and cyan light-emitting device can be a strip arrangement, a diamond-type arrangement, a pentile arrangement or an irregular shape or size of a rubber duck arrangement. The light-emitting area of ​​each color pixel can be completely the same, or its area and shape and size can be different from each other.

[0048] In the full-color organic electroluminescent display device of the present invention, one or more of the red light guest material, green light guest material, blue light guest material, and cyan light guest material are selected from the boron-containing fluorescent material shown in general formula (1):

[0049]

[0050] In equation (1), M1, M2, and M3 independently represent C3 to C3, which are either substituted by one or more R molecules or are not substituted. 10 Cycloalkyl groups, C3-C6 substituted with one or more R groups or unsubstituted C3-C6 substituted with R groups. 10 Heterocyclic alkyl groups, C6-C6 substituted with one or more R groups or unsubstituted C6-C6 alkyl groups. 60 The aromatic group, C2-C, substituted with one or more R groups or unsubstituted C2-C groups. 60 One of the heteroaryl groups;

[0051] Ar1, Ar2, and Ar3 are independently represented as a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, or a C1-C group substituted with one or more R atoms or not substituted. 10 Alkyl groups, C3-C3 groups substituted with one or more R groups or unsubstituted groups. 10 Cycloalkyl, C1-C1 substituted with one or more R groups or unsubstituted C1-C1 substituted with R groups 10 Silyl group, C2-C substituted with one or more R groups or unsubstituted C2-C substituted with R groups 10Boronyl groups, C1-C6 groups substituted with one or more R groups or unsubstituted groups 10 Alkoxy group, C2-C substituted with one or more R groups, or unsubstituted C2-C substituted with R groups. 10 Alkenyl group, C6-C substituted with one or more R groups or unsubstituted C6-C substituted with R groups 30 Aromatic amino group, C6-C substituted with one or more R groups or unsubstituted C6-C6 groups 60 aryl group, C2-C substituted with one or more R groups or unsubstituted C2-C substituted group 60 Heteroaryl groups, C6-C6 groups substituted with one or more R groups or unsubstituted C6-C6 groups. 30 One of the aryl groups;

[0052] R represents a deuterium atom, a halogen atom, a cyano group, or a C1-C1 group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C30 aromatic amino groups substituted or unsubstituted, C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups;

[0053] a, b, and c are each independently 0 or 1;

[0054] X1, X2, and X3 are independently represented as single bonds, double bonds, -O-, -S-, -N(R'1)-, -B(R'2)-, -C(R'3)(R'4)-, -Si(R'5)(R'6)-, or -C(R'7)=C(R'8)-;

[0055] R'1, R'2, R'3, R'4, R'5, R'6, R'7, and R'8 are each independently represented as C1 to C2 groups that are substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups;

[0056] The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups;

[0057] The heteroatom in the heteroaryl group is selected from one or more of O, S, N, Si, and B.

[0058] Preferably, the general formula (1) is further represented by the structure shown in general formula (1-1):

[0059]

[0060] In general formula (1-1), the meanings of M1, M2, M3, Ar1, Ar2, Ar3, and X3 are the same as those defined in general formula (1).

[0061] Preferably, the general formula (1) is further represented by the structure shown in general formula (1-2):

[0062]

[0063] In general formula (1-2), the meanings of M1, M2, and M3 are the same as those defined in general formula (1);

[0064] Ar4 and Ar5 are independently represented as C1-C1 cells, substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups;

[0065] The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups.

[0066] Preferably, the general formula (1) is further represented as the structure shown in general formula (1-3) or general formula (1-4):

[0067]

[0068] In general formulas (1-3) and (1-4), A1, A2, A3, A4, and A5 are independently represented as C6 to C6 substituted or unsubstituted by one or more R's. 60 The aromatic ring, C2-C substituted or unsubstituted by one or more R's. 60 One of the aromatic rings;

[0069] Ar4 and Ar5 are independently represented as C1 to C5 groups substituted or unsubstituted by one or more R's. 10 Alkyl groups, C3-C3 groups substituted with or unsubstituted with one or more R' groups. 10 Cycloalkyl, C2-C2 substituted or unsubstituted by one or more R' groups 10 Alkenyl, C6-C substituted or unsubstituted with one or more R' groups 60 aryl, C2-C substituted or unsubstituted by one or more R' groups 60 One of the heteroaryl groups;

[0070] R' represents a deuterium atom, a halogen atom, a cyano group, or a C1-C1 group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups;

[0071] Y1, Y2, Y3, Y4, R1, R2, R3, R4, and R5 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and C1-C1 atoms substituted or unsubstituted with substituents, respectively. 10 (e.g., C2, C3, C4, C5, C6, C7, C8, C9, etc.) alkyl groups, C3-C9 groups substituted or unsubstituted. 10 (e.g., C4, C5, C6, C7, C8, C9, etc.) cycloalkyl groups, C2-C6 groups substituted or unsubstituted. 10(e.g., C3, C4, C5, C6, C7, C8, C9, etc.) alkenyl groups, C6-C6 groups substituted or unsubstituted. 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 (e.g., C6, C9, C10, C12, C14, C15, C16, C18, C20, C22, C24, C26, C28, C30, C32, etc.) aryl groups, C2-C6 groups substituted or unsubstituted. 60 (e.g., C3, C6, C9, C10, C12, C14, C15, C16, C18, C20, C22, C24, C26, C28, C30, C32, etc.) heteroaryl groups, C2-C6 groups substituted or unsubstituted. 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups;

[0072] R1 and R2 are either not connected or connected in a loop; R2 and R3 are either not connected or connected in a loop; R4 and R5 are either not connected or connected in a loop.

[0073] Y1 and Y2 are either not connected or connected in a loop, and Y3 and Y4 are either not connected or connected in a loop.

[0074] The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups;

[0075] The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

[0076] Further preferably, the general formula (1) is further represented as any one of the structures shown in general formulas (1-5), (1-6), (1-7), or (1-8):

[0077]

[0078] In general formulas (1-5), (1-6), (1-7), and (1-8), A1, A2, A3, and A4 are independently represented as C6 to C6 substituted or unsubstituted by one or more R's. 60The aromatic ring, C2-C2 with or without one or more R-substituted or unsubstituted R-substituted rings. 60 One of the aromatic rings;

[0079] The "R" represents a deuterium atom, a halogen atom, a cyano group, or a C1-C1 group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C30 aromatic amino groups substituted or unsubstituted, C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups;

[0080] Ar6 and Ar7 are independently represented as C1 to C6 groups substituted or unsubstituted by one or more R's. 10 Alkyl groups, C3-C3 groups substituted or unsubstituted with one or more R's. 10 Cycloalkyl, C2-C2 substituted or unsubstituted by one or more R's. 10 Alkenyl, C6-C substituted or unsubstituted with one or more R's. 60 Aryl group, C2-C2 substituted or unsubstituted by one or more R's. 60 One of the heteroaryl groups;

[0081] Y1, Y2, Y3, Y4, R1, R2, R3, R4, R5, and R6 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and C1-C1 atoms substituted or unsubstituted with substituents, respectively. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups30 One of the aryl groups;

[0082] Ar6 and Ar7 are either not connected or connected in a loop; Y1 and Y2 are either not connected or connected in a loop; Y3 and Y4 are either not connected or connected in a loop.

[0083] The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups;

[0084] The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

[0085] Preferably, the general formula (1) is further represented as any one of the structures shown in general formulas (1-9) to (1-11):

[0086]

[0087] In general formulas (1-9) to (1-11), A1, A2, A3, A4, A5, and A6 are independently represented as C6 to C6 substituted or unsubstituted by one or more R''. 60 The aromatic ring, C2-C2 with or without one or more R-substituted or unsubstituted R-substituted rings. 60 One of the aromatic rings;

[0088] The R”' represents a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C1 group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0089] Ar6, Ar7, Ar8, Ar9, Ar 10 Ar 11Each is independently represented as C1 to C1 substituted or unsubstituted by one or more R”'. 10 Alkyl groups, C3-C3 groups substituted or unsubstituted with one or more R''. 10 Cycloalkyl, C2-C2 substituted or unsubstituted by one or more R'' substituted groups 10 Alkenyl, C6-C substituted or unsubstituted by one or more R''. 60 Aryl group, C2-C substituted or unsubstituted by one or more R'' groups 60 One of the heteroaryl groups;

[0090] Ar6 and Ar7 are either not connected or connected in a loop; Ar8 and Ar9 are either not connected or connected in a loop.

[0091] In equation (1-10), X represents a single bond, a double bond, -O-, -S-, -N(R”1)-, -B(R”2)-, -C(R”3)(R”4)-, -Si(R”5)(R”6)- or -C(R’7)=C(R’8)-;

[0092] R”1, R”2, R”3, R”4, R”5, R”6, R”7, and R”8 are each independently represented as C1 to C2 cells substituted or unsubstituted by substituents. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups;

[0093] The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups;

[0094] The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

[0095] More preferably, the general formula (1) is further represented by any of the structures shown in general formulas (1-12) to (1-15):

[0096]

[0097]

[0098] In general formulas (1-12) to (1-15), R1, R2, R3, R4, R5, R6, R7, R8, R9, R 10 R 11 R 12 Each of the following can be represented independently as a hydrogen atom, deuterium atom, halogen atom, cyano group, or C1-C1 atoms substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C2-C, substituted or unsubstituted 10 Alkyne group, C1-C6 groups substituted or unsubstituted 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 10 Aryloxy group, C6-C6 substituted or unsubstituted groups 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 30 Aryl, substituted or unsubstituted C2-C 30 heteroaryl, C2-C substituted or unsubstituted 10 One of the boroalkyl groups;

[0099] Ar1 represents a hydrogen atom, deuterium atom, halogen atom, cyano group, or C1-C1 atoms that are substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C2-C, substituted or unsubstituted 10 Alkyne group, C1-C6 groups substituted or unsubstituted 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 10 Aryloxy group, C6-C6 substituted or unsubstituted groups 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 30 Aryl, substituted or unsubstituted C2-C 30 One of heteroaryl groups, or one of C2-C10 borane groups that are substituted or unsubstituted;

[0100] a1, a2, a3, a4, a5, a6, and a7 can be independently represented as 0, 1, 2, 3, or 4;

[0101] X represents a single bond, double bond, -O-, -S-, or -N(R). a - or -C(R) b (R) c )-, the R a Rb R c Individually represented as C1 to C2 cells substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aryl, substituted or unsubstituted C2-C 30 One of the heteroaryl groups;

[0102] The substituents are selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C3-C 10 cycloalkyl, deuterated C3-C 10 cycloalkyl, C6-C 30 Aryl and deuterium-substituted C6-C 30 Aryl, C2~C 30 heteroaryl and deuterium-substituted C2-C 30 Any one or more of the heteroaryl groups;

[0103] The heteroatom in the heteroaryl group is selected from one or more of O, S, N, Si, and B.

[0104] Preferably, the boron-containing fluorescent material shown in general formula (1) has the structure shown in general formula (1-16):

[0105]

[0106] In general formula (1-16), R1 and R2 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and C1 to C2 atoms substituted or unsubstituted with substituents, respectively. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C2-C, substituted or unsubstituted 10 Alkyne group, C1-C6 groups substituted or unsubstituted 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 10 Aryloxy group, C6-C6 substituted or unsubstituted groups 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 30 Aryl, substituted or unsubstituted C2-C 30 heteroaryl, C2-C substituted or unsubstituted 10 One of the boroalkyl groups;

[0107] Each occurrence of Z is independently represented as N, C-(H), or C-(Ra);

[0108] Ra represents a deuterium atom, a halogen atom, a cyano group, or a C1-C group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C2-C, substituted or unsubstituted 10 Alkyne group, C1-C6 groups substituted or unsubstituted 10 Alkoxy groups, substituted or unsubstituted C5-C6 groups 10 Aryloxy group, C6-C6 substituted or unsubstituted groups 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 30 Aryl, substituted or unsubstituted C2-C 30 heteroaryl, C2-C substituted or unsubstituted 10 Boronyl groups, substituted or unsubstituted C2-C3 groups 10 One of the silane groups;

[0109] X1 and X2 independently represent N-R0, S, or O, respectively;

[0110] The R0 is independently represented as substituted or unsubstituted C1-C. 10 Alkyl, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C 12 -C 10 Alkenyl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C6-C 30 Aryl, substituted or unsubstituted C2-C 30 One of the heteroaryl groups;

[0111] The above substituents can be selected from deuterium, halogen atoms, cyano groups, C1 to C2. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C3-C 10 cycloalkyl, deuterated C3-C 10 cycloalkyl, C6-C 30 Aryl and deuterium-substituted C6-C 30 Aryl, C2~C 30 heteroaryl and deuterium-substituted C2-C 30 Any one or more of the heteroaryl groups;

[0112] The heteroatom in the heteroaryl group is selected from one or more of O, S, N, Si, and B.

[0113] More preferably, the boron-containing fluorescent material shown in the above general formula (1) has any one of the following structures:

[0114]

[0115]

[0116]

[0117] Furthermore, one or more of the red light guest material, green light guest material, blue light guest material, cyan light guest material, and yellow light guest material have the structure shown in any one of general formulas (2-1) to (2-5):

[0118]

[0119]

[0120] In general formulas (2-1) to (2-5), M4, M5, M6, and M7 are independently represented as C6 to C6 cells substituted or unsubstituted by one or more R's. 60 The aryl group, substituted with one or more R's or not substituted, C2-C 60 One of the heteroaryl groups;

[0121] The "R" represents a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C1 group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6–C30 aromatic amino groups, substituted or unsubstituted C6–C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0122] R1, R2, R3, and R4 are independently represented as a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, or C1-C1 atoms substituted or unsubstituted with substituents. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups;

[0123] n1 and n2 are independently represented as 0, 1, 2 or 3 respectively; m1, m2, m3, and m4 are independently represented as 0, 1, 2, 3 or 4 respectively.

[0124] The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups;

[0125] The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

[0126] More preferably, the general formulas (2-1) to (2-5) are further represented as any of the structures shown in general formulas (2-6) to (2-11):

[0127]

[0128]

[0129] In general formulas (2-6) to (2-11), R1, R2, R3, R4, R5, R6, R7, and R8 represent hydrogen atoms, deuterium atoms, halogen atoms, cyano groups, and C1 to C1 atoms substituted or unsubstituted with substituents. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups;

[0130] m1, m2, m3, m4, m5, m6, m7, and m8 are each independently represented as 0 to the maximum allowed number of substitutions;

[0131] The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups;

[0132] The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

[0133] More preferably, the compounds of general formula (2-1)-general formula (2-5) have the following structures:

[0134]

[0135] Furthermore, one or more of the red light guest material, green light guest material, blue light guest material, and cyan light guest material have the structure shown in general formula (3):

[0136]

[0137] In general formula (3), M1 represents C3 to C1 that are substituted or not substituted by one or more R's. 10 Cycloalkyl groups, C3-C3 substituted with one or more R'', or unsubstituted. 10 Heterocyclic alkyl groups, C6-C6 substituted with one or more R'' or unsubstituted. 60 The aromatic group, C2-C, is substituted with one or more R's or is unsubstituted. 60 One of the heteroaryl groups;

[0138] The R””’ represents a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C1 group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0139] Ar1, Ar2, Ar3, and Ar4 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and substituted or unsubstituted C1-C1 atoms, respectively. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0140] Ar1 and Ar2 are either not connected or are connected in a loop; Ar3 and Ar4 are either not connected or are connected in a loop.

[0141] R1, R2, R3, R4, R5, and R6 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and substituted or unsubstituted C1-C1 atoms, respectively. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0142] The substituents used for the substituent groups are optionally selected from deuterium, halogen atoms, cyano groups, C1-C2 groups.10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups;

[0143] The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

[0144] Preferably, the compound of general formula (3) is represented by the following structure:

[0145]

[0146]

[0147] Furthermore, the phosphorus photosensitizer has a structure shown in any one of general formulas (4-1) to (4-4):

[0148]

[0149] In general formulas (4-1) to (4-4), Y, Z, J, and K are independently represented as N or C-R0;

[0150] The R0 is independently represented by a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C1 group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0151] The rings A, A1, A2, A3, and A4 are each independently represented as C6 to C6 cells substituted or unsubstituted by one or more R's. 60 The aromatic ring, C2-C2 with one or more R-substituted or unsubstituted rings. 60 One of the aromatic rings;

[0152] The R””” represents a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0153] X'1 and X'2 are independently represented as C6~C6 molecules that are substituted or not substituted by one or more R'"". 60 The aromatic ring, C2-C2 with one or more R-substituted or unsubstituted rings. 60 One of the aromatic rings;

[0154] R1, R2, R3, and R4 represent hydrogen atoms, deuterium atoms, halogen atoms, cyano groups, and substituted or unsubstituted C1-C atoms. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0155] n is represented as 1 or 2; k2, k3, g1, g2, g3, and g4 are independently represented as 0, 1, 2, or 3, respectively;

[0156] T1 to T4 are each independently a chemical bond, oxygen, or sulfur;

[0157] L1 to L4 are independently single-bonded, oxygen-containing, sulfur-containing, substituted, or unsubstituted C6-C bonds, respectively. 60 Aromatic groups, substituted or unsubstituted C2-C 60 One of the heteroaryl groups;

[0158] Y'1, Y'2, Y'3, and Y'4 are each independently N or C;

[0159] The substituents used for the substituent groups are optionally selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups;

[0160] The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

[0161] The phosphorus photosensitizer has a structure shown in any one of general formulas (4-5) to (4-10):

[0162]

[0163] In general formulas (4-5) to (4-10), Z is represented by N or CR each time it appears, either the same or different. Z ;

[0164] The R Z Each occurrence is independently represented as a hydrogen atom, deuterium atom, halogen atom, cyano group, or substituted or unsubstituted C1-C. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C2-C 10 Alkyne group, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 aryloxy group, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups;

[0165] Y represents O, S, N(R) a ), C(R b (R) c ); m represents 1 or 2, n represents 1 or 2, and m+n is 3;

[0166] Y1, Y2, Y3, and Y4 represent single bonds, O, S, and N(R).a ), C(R b (R) c j, p, q represent 0 or 1;

[0167] R a R b R c Each occurrence is independently represented as either substituted or unsubstituted C1 to C2. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C2-C 10 Alkyne group, substituted or unsubstituted C6-C 30 Aryl, substituted or unsubstituted C2-C 30 Any one of the heteroaryl groups;

[0168] The substituents used for the substituent groups are optionally selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups.

[0169] The phosphorus photosensitive material is selected from the following structures:

[0170]

[0171]

[0172] Furthermore, the thermally activated delayed fluorescence sensitizer is a compound with the structural characteristics of DA, DDA, or DAD, where D is a donor characteristic group and A is an acceptor characteristic group;

[0173] Preferably, D is carbazole and its derivatives, triarylamine and its derivatives, and A is a compound including a cyano group, a fluorine atom, a triazine group, and a tonne;

[0174] Preferably, the thermally activated delayed fluorescence sensitizer has a structure shown in any of the following general formulas (5-1) to (5-13):

[0175]

[0176]

[0177] In general formulas (5-1) to (5-13), R1, R2, R3, R4, R5, R6, R7, R8, R9, R 10 Each can be independently represented as a hydrogen atom, deuterium atom, halogen atom, cyano group, or substituted or unsubstituted C1-C1 atoms. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups;

[0178] Ar'1, Ar'2, and Ar'3 are independently represented as substituted or unsubstituted C1 to C2 groups, respectively. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups;

[0179] The substituents used for the substituent groups are optionally selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups.

[0180] The full-color organic electroluminescent display device of the present invention introduces a cyan light-emitting device to add a pixel unit capable of emitting cyan light on the basis of the existing RGB three primary colors, upgrading the RGB three primary color display method to a four primary color display method. This can greatly expand the color gamut coverage of the display device, improve the color reproduction of the display device, and significantly improve the efficiency and lifespan of the cyan light-emitting device by using sensitizing materials in the cyan light-emitting layer. The high efficiency results in low power consumption and high brightness of the display device, thereby improving the performance of the display device.

[0181] Taking the BT2020 display as an example, if a fourth primary color with a CIEEx value of 0.05 and a CIEy value of 0.36 is added, the color gamut coverage will increase from the original 63.7% to 74.7%, an increase of 11%. This will undoubtedly greatly improve the display quality and visual effect of the display device.

[0182] In traditional RGB three-primary-color displays, increasing the brightness of the screen requires simultaneously improving the brightness of all three primary colors. However, due to limitations in blue light technology, significantly improving the efficiency and brightness of the blue light emitters used in the display presents a significant challenge. This invention adds at least one cyan light-emitting device to the existing three primary colors. Through the auxiliary action of this cyan light-emitting device, the brightness response when displaying blue colors can be increased, thereby improving the overall brightness of the screen and effectively reducing power consumption.

[0183] Taking AM-OLED displays as an example, among the traditional red, green, and blue three-primary-color OLED materials and devices that constitute an OLED display, the driving life of the device paired with the blue material is the shortest under equal brightness driving conditions, thus limiting the lifespan of the full-color OLED display. The technical solution of this invention adds a cyan light-emitting device, which can greatly reduce the lamp-lighting pressure of the blue pixel device, thereby significantly improving the lifespan of the OLED display. Under different brightness levels, the degradation acceleration factor of the device is between 1.3 and 1.7; the higher the brightness of the device, the faster the degradation rate. Based on a four-primary-color pixel design, this invention has two sub-pixels serving the blue color performance of the screen, which helps to improve brightness while also extending the lifespan of the display.

[0184] The full-color organic electroluminescent display device of the present invention can be operated to emit light with desired CIE coordinates for any specific CIE coordinates, using up to three of the four devices, and requiring only two devices for white light. Compared with a display screen that only has red, green and blue devices, the use of blue devices can be significantly reduced.

[0185] This invention presents a full-color organic electroluminescent display device solution, which expands the range of material choices. Compared to blue fluorescent OLED materials and their associated devices, while blue phosphorescent OLED materials and their associated devices offer improved efficiency, their lifespan at the same brightness level is significantly lower. Based on this invention, because of the presence of cyan light-emitting devices, blue phosphorescent materials and their associated devices can potentially be directly used in OLED display devices, greatly expanding the range of OLED material choices and thus potentially improving the overall performance of the display, including power consumption. Improving display brightness is crucial for enhancing the visual effect of the display, especially the color gamut. The so-called color gamut space includes two important factors: the color gamut coverage area and the pixel brightness. Simply increasing the color gamut coverage area has a very limited effect on improving the color gamut space. Only when the maximum brightness of the display screen is also increased can the potential of the color gamut area be fully realized and the optimal color gamut space be obtained. For example, compared to the maximum brightness requirement of about 800 nits on the surface of a DCI-P3 color gamut display screen, the ideal peak brightness of a BT.2020 color gamut display screen is required to reach a level of about 10,000 nits. This also requires that the sub-pixel devices that make up the display device have a good performance foundation in terms of light efficiency and lifespan.

[0186] This invention, a full-color organic electroluminescent display device, helps improve people's eye habits, enhance eye hygiene, and reduce eye fatigue. Modern people spend increasingly more time using electronic display products, and prolonged use of traditional artificial light-emitting display products, coupled with the limited color gamut coverage of these products, easily leads to eye diseases such as color weakness, myopia, and dry eye, posing a threat to health. While artificial light-emitting display devices cannot perfectly reproduce the continuous spectrum of nature, their color spectrum should be as rich as possible to achieve a physiologically friendly effect. Attached Figure Description

[0187] Figure 1 This is a schematic diagram of the structure of the red light-emitting device, green light-emitting device, blue light-emitting device and cyan light-emitting device of the present invention;

[0188] Wherein, 1 is a transparent substrate layer, 2 is an anode layer, 3 is a hole injection layer, 4 is a hole transport layer, 5 is an electron blocking layer, 6 is a light-emitting layer, 7 is a hole blocking layer, 8 is an electron transport layer, 9 is an electron injection layer, 10 is a cathode layer, and 11 is a CPL layer.

[0189] Figure 2 The 1931 CIE chromaticity diagram was developed by the International Commission on Illumination in 1931.

[0190] Any color can be described using its x and y coordinates on the graph. The graph also shows several color gamuts, which are a set of colors that can be rendered by a specific display device or other components that display colors. Generally, any given light-emitting device has an emission spectrum at specific CIE coordinates. Emissions from two devices can be combined in various intensities to present a color with CIE coordinates at any position on a straight line between the CIE coordinates of the two devices. Emissions from three devices can be combined in various intensities to present a color with CIE coordinates at any position within a triangle defined by the corresponding coordinates of the three devices on the CIE graph.

[0191] Figure 3 This is a schematic diagram of the color gamut coverage of red, green, blue, and cyan pixels under the 1931 CIE chromaticity diagram.

[0192] It includes four primary colors: red, green, blue, and cyan. The red, green, and blue primary colors are selected using the standard BT2020 color coordinates, while the cyan pixel color coordinates are CIE (0.05; 0.36). The color gamut of the four primary colors, including the cyan light-emitting device, has increased from 63.7% to 74.7%.

[0193] Figure 4 This is a schematic diagram of the color gamut coverage of the five colors of pixels (red, green, blue, cyan, and yellow) under the 1931 CIE chromaticity diagram.

[0194] It includes the five primary colors: red, green, blue, cyan, and yellow. Here, the red, green, and blue primary colors are selected using the standard BT2020 color coordinates, while the cyan pixel color coordinates are CIE (0.05; 0.36) and the yellow pixel color coordinates are CIE (0.49; 0.505). The color gamut coverage of the five primary colors, including cyan and yellow light-emitting devices, has been slightly improved from 74.7%. At the same time, it will make a significant contribution to the color performance of the display and the reduction of power consumption.

[0195] Figure 5 This is the D65 white field spectrum of the multi-primary color devices of the full-color organic electroluminescent display device of the present invention;

[0196] The white field spectrum composition includes various types, including white fields composed of a mixture of cyan, green, and red spectra, white fields composed of a mixture of red, green, and blue primary colors, and white fields composed of a two-color spectrum formed by combining cyan and red light-emitting devices. When the white field is composed of cyan, green, and red, the proportion of the green component is less than 30% of the overall spectrum composition, based on considerations of luminous efficacy and brightness.

[0197] Figure 6 This is a schematic diagram showing the arrangement of the red, green, blue, and cyan light-emitting devices of the present invention.

[0198] Figure 7This is a schematic diagram showing the arrangement of the red, green, blue, cyan, and yellow light-emitting devices of the present invention.

[0199] Figure 8 This is a schematic diagram of the spectra of pyrene-based blue light materials and boron-nitrogen-based blue light materials.

[0200] Figure 9 It is a spectrum of four colors: red, green, cyan, and blue. Detailed Implementation

[0201] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0202] In this invention, the terms "upper," "lower," "top," and "bottom," used to describe electrodes, organic electroluminescent devices, and other structures, indicate orientation only in a specific state and do not imply that the structure can only exist in that orientation. Conversely, if the structure can be repositioned, such as by inverting it, the orientation of the structure changes accordingly. Specifically, in this invention, the "bottom" or "lower" side of the electrode refers to the side of the electrode closer to the substrate during fabrication, while the opposite side farther from the substrate is the "top" or "upper" side.

[0203] In this invention, the C6-C30 aromatic amino group, whether substituted or unsubstituted, as described herein refers to... Wherein Q1 and Q2 represent aromatic groups that are substituted or unsubstituted, and Q1 and Q2 preferably represent C6-C groups that are substituted or unsubstituted. 30 The aryl group may be substituted or unsubstituted at C2-C2. 30 Mixed aromatic compounds.

[0204] In this invention, the linking into rings refers to linking into aromatic rings, heteroaromatic rings, or aliphatic rings, preferably linking into C6-C6 rings. 30 Aromatic rings, C2-C 30 heterocyclic aromatic rings or C6-C 30 Aliphatic rings are preferably linked by single bonds, double bonds, -O-, -S-, -N(R'1)-, -C(R'2)(R'3)-, -Si(R'4)(R'5)- or -C(R'6)=C(R'7)-, and are preferably linked to form benzene rings substituted or unsubstituted by substituents, naphthalene rings substituted or unsubstituted by substituents, or cyclohexanes substituted or unsubstituted by substituents;

[0205] R'1, R'2, R'3, R'4, R'5, R'6, and R'7 are independently represented as C1 to C2 groups, substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aryl, substituted or unsubstituted C2-C 30 One of the heteroaryl groups;

[0206] R'2 and R'3 are not connected or are linked by single bonds, double bonds, -O-, -S-, -N(ph)-, dimethyl-substituted methylene, or diphenyl-substituted methylene to form a ring.

[0207] R'4 and R'5 are not connected or are linked by single bonds, double bonds, -O-, -S-, -N(ph)-, dimethyl-substituted methylene, or diphenyl-substituted methylene to form a ring.

[0208] R'6 and R'7 are not connected or are linked by single bonds, double bonds, -O-, -S-, -N(ph)-, dimethyl-substituted methylene, or diphenyl-substituted methylene to form a ring.

[0209] In this invention, C6 to C are substituted or unsubstituted. 30 Aryl refers to an aryl group with 6 to 30 substituted or unsubstituted carbon atoms, preferably an aryl group with 6 to 20 substituted or unsubstituted carbon atoms, preferably an aryl group with 6 to 18 substituted or unsubstituted carbon atoms, preferably an aryl group with 6 to 10 substituted or unsubstituted carbon atoms, preferably substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted anthraceneyl, substituted or unsubstituted fluorenyl, substituted or unsubstituted dimethylfluorenyl, substituted or unsubstituted diphenylfluorenyl, substituted or unsubstituted spirofluorenyl, substituted or unsubstituted phenanthrene, substituted or unsubstituted tetraphenyl, substituted or unsubstituted pyrene, substituted or unsubstituted diphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted The compounds may include, but are not limited to, substituted or unsubstituted triphenyl, substituted or unsubstituted peryl, substituted or unsubstituted indole, substituted or unsubstituted 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthyl.

[0210] In this invention, C6~C 30 Aryl refers to an aryl group having 6 to 30 carbon atoms, preferably an aryl group having 6 to 20 carbon atoms, more preferably an aryl group having 6 to 18 carbon atoms, and more preferably an aryl group having 6 to 10 carbon atoms. Other preferred aryl groups include phenyl, naphthyl, anthraceneyl, fluorenyl, dimethylfluorenyl, diphenylfluorenyl, spirofluorenyl, phenanthryl, tetraphenyl, pyrene, diphenyl, and terphenyl. The compounds include, but are not limited to, triphenyl, peryl, indole, 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthyl.

[0211] In this invention, deuterium-substituted C6-C30 The aryl group refers to a deuterated aryl group with 6 to 30 carbon atoms, preferably a deuterated aryl group with 6 to 20 carbon atoms, preferably a deuterated aryl group with 6 to 18 carbon atoms, preferably a deuterated aryl group with 6 to 10 carbon atoms, and preferably a deuterated phenyl, deuterated naphthyl, deuterated anthracene, deuterated fluorenyl, deuterated dimethylfluorenyl, deuterated diphenylfluorenyl, deuterated spirofluorenyl, deuterated phenanthrene, deuterated tetraphenyl, deuterated pyrene, deuterated diphenyl, deuterated terphenyl, and deuterated... The compounds include, but are not limited to, deuterated triphenyl, deuterated peryl, deuterated indyl, and deuterated 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthyl.

[0212] In this invention, C2 to C are substituted or unsubstituted. 30 Heteroaryl refers to a heteroaryl group with 2 to 30 substituted or unsubstituted carbon atoms, preferably a heteroaryl group with 2 to 20 substituted or unsubstituted carbon atoms, preferably a heteroaryl group with 4 to 20 substituted or unsubstituted carbon atoms, preferably a heteroaryl group with 4 to 10 substituted or unsubstituted carbon atoms, preferably a heteroaryl group with 5 to 10 substituted or unsubstituted carbon atoms, preferably a heteroaryl group with 6 to 12 substituted or unsubstituted carbon atoms, preferably a furanyl group, a thiophene group, a pyrrole group, a pyrazolyl group, a pyrazolyl group, a substituted imidazolyl group, a triazolyl group, a substituted oxazolyl group, a substituted thiazolyl group, a substituted oxadiazolyl group, a substituted thiadiazolyl group, a substituted pyridyl group, a substituted pyrimidinyl group, a substituted pyrimidinyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted pyrid ... Unsubstituted pyrazinyl, substituted or unsubstituted triazine, substituted or unsubstituted benzofuranyl, substituted or unsubstituted benzothiophenyl, substituted or unsubstituted benzimidazolyl, substituted or unsubstituted indoleyl, substituted or unsubstituted quinolinyl, substituted or unsubstituted isoquinolinyl, substituted or unsubstituted quinazolinyl, substituted or unsubstituted quinolinyl, substituted or unsubstituted naphridyl, substituted or unsubstituted benzoxazinyl, substituted or unsubstituted benzothiazinyl, substituted or unsubstituted acridineyl, substituted or unsubstituted benziazinyl, substituted or unsubstituted benziazinyl, substituted or unsubstituted benziazinyl, substituted or unsubstituted tyloyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiaphenyl, substituted or unsubstituted carbazoyl, substituted or unsubstituted N-phenylcarbazoyl, substituted or unsubstituted benzoindoleyl, but not limited thereto.

[0213] In this invention, C2~C 30Heteroaryl refers to heteroaryl groups with 2 to 30 carbon atoms, preferably heteroaryl groups with 2 to 20 carbon atoms, more preferably heteroaryl groups with 4 to 20 carbon atoms, more preferably heteroaryl groups with 4 to 10 carbon atoms, more preferably heteroaryl groups with 6 to 12 carbon atoms, and preferably furanyl, thiophene, pyrrole, pyrazolyl, imidazolyl, triazolyl, oxazolyl, thiazolyl, oxadiazolyl, thiadiazolyl, pyridinyl, pyrimidinyl, pyrimidyl The following are not limited to: pyridyl, pyrazinyl, triazinyl, benzofuranyl, benzothiophenyl, benzoimidazolyl, indolyl, quinolinyl, isoquinolinyl, quinazolinyl, quinolinyl, naphridinyl, benzooxazinyl, benzothiazinyl, acridineyl, benazinoyl, benazinoyl, benazinoyl, benazinoyl, fumonyl, dibenzofuranyl, dibenzothiaphenyl, carbazolyl, substituted or unsubstituted N-phenylcarbazolyl, benzoindolyl.

[0214] In this invention, deuterium-substituted C2-C 30 The heteroaryl group refers to a heteroaryl group with 5 to 30 deuterated carbon atoms, preferably a heteroaryl group with 5 to 20 deuterated carbon atoms, preferably a heteroaryl group with 5 to 10 deuterated carbon atoms, preferably a heteroaryl group with 6 to 12 deuterated carbon atoms, preferably deuterated furanyl, deuterated thiophene, deuterated pyrrole, deuterated pyrazolyl, deuterated imidazolyl, deuterated triazolyl, deuterated oxazolyl, deuterated thiazolyl, deuterated oxadiazolyl, deuterated thiadiazolyl, deuterated pyridyl, deuterated pyrimidinyl, deuterated pyrazinyl, deuterated triazine, and deuterated... Substituted benzofuranyl, deuterated benzothiophenyl, deuterated benzimidazolyl, deuterated indolyl, deuterated quinolinyl, deuterated isoquinolinyl, deuterated quinazolinyl, deuterated quinolinyl, deuterated naphthidyl, deuterated benzoxazinyl, deuterated benzothiazinyl, deuterated acridineyl, deuterated benzazinyl, deuterated benzthiazinyl, deuterated benzoxazinyl, deuterated fumonyl, deuterated dibenzofuranyl, deuterated dibenzothiaphenyl, deuterated carbazoyl, deuterated substituted N-phenylcarbazoyl, deuterated benzoindolyl, but not limited to these.

[0215] In this invention, the number of heteroatoms in the heteroaryl group is 1-5, preferably 1-4, preferably 1-3, preferably 1-2, and preferably 1.

[0216] The substituted or unsubstituted C1-C of this invention 10Alkyl (including straight-chain alkyl and branched-chain alkyl) refers to alkyl groups with 1 to 10 substituted or unsubstituted carbon atoms, preferably alkyl groups with 1 to 5 substituted or unsubstituted carbon atoms, preferably alkyl groups with 1 to 4 substituted or unsubstituted carbon atoms, preferably substituted or unsubstituted methyl, substituted or unsubstituted ethyl, substituted or unsubstituted propyl, substituted or unsubstituted isopropyl, substituted or unsubstituted butyl, substituted or unsubstituted tert-butyl, substituted or unsubstituted isobutyl, substituted or unsubstituted sec-butyl, substituted or unsubstituted neopentyl, substituted or unsubstituted n-pentyl, substituted or unsubstituted isopentyl, substituted or unsubstituted octyl, substituted or unsubstituted heptyl, substituted or unsubstituted n-decyl, substituted or unsubstituted 1-methylpentyl, substituted or unsubstituted 2-methylpentyl, substituted or unsubstituted 3-methylpentyl, substituted or unsubstituted 1-butylpentyl, etc., but not limited to these.

[0217] The C1 to C of this invention 10 Alkyl (including straight-chain alkyl and branched-chain alkyl) refers to an alkyl group having 1 to 10 carbon atoms, preferably an alkyl group having 1 to 5 carbon atoms, more preferably an alkyl group having 1 to 4 carbon atoms, and preferably methyl, ethyl, propyl, isopropyl, butyl, tert-butyl, isobutyl, sec-butyl, neopentyl, n-pentyl, isopentyl, octyl, heptyl, n-decyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 1-butylpentyl, etc., but not limited to these.

[0218] The deuterium-substituted C1-C of the present invention 10 Alkyl (including straight-chain alkyl and branched-chain alkyl) refers to a deuterated alkyl group having 1 to 10 carbon atoms, preferably a deuterated alkyl group having 1 to 5 carbon atoms, preferably a deuterated alkyl group having 1 to 4 carbon atoms, preferably deuterated methyl, deuterated ethyl, deuterated propyl, deuterated isopropyl, deuterated butyl, deuterated tert-butyl, deuterated isobutyl, deuterated sec-butyl, deuterated neopentyl, deuterated n-pentyl, deuterated isopentyl, deuterated octyl, deuterated heptyl, deuterated n-decyl, deuterated 1-methylpentyl, deuterated 2-methylpentyl, deuterated 3-methylpentyl, deuterated 1-butylpentyl, etc., but not limited to these.

[0219] The substituted or unsubstituted C3-C of this invention 10The cycloalkyl group preferably uses substituted or unsubstituted C4-C9 cycloalkyl groups, more preferably substituted or unsubstituted C5-C8 cycloalkyl groups, and particularly preferably substituted or unsubstituted C5-C7 cycloalkyl groups. Non-limiting examples may include, but are not limited to, substituted or unsubstituted cyclopropyl, substituted or unsubstituted cyclobutyl, substituted or unsubstituted cyclopentyl, substituted or unsubstituted cyclohexyl, substituted or unsubstituted 4-methylcyclohexyl, substituted or unsubstituted 4,4-dimethylcyclohexyl, substituted or unsubstituted adamantyl, and substituted or unsubstituted cycloheptyl.

[0220] The C3~C of this invention 10 The cycloalkyl group is preferably C4-C9 cycloalkyl, more preferably C5-C8 cycloalkyl, and particularly preferably C5-C7 cycloalkyl. Non-limiting examples may include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl, adamantyl, and cycloheptyl.

[0221] The deuterium-substituted C3-C of the present invention 10 The cycloalkyl group is preferably a deuterated C4-C9 cycloalkyl group, more preferably a deuterated C5-C8 cycloalkyl group, and particularly preferably a deuterated C5-C7 cycloalkyl group. Non-limiting examples may include, but are not limited to, deuterated cyclopropyl, deuterated cyclobutyl, deuterated cyclopentyl, deuterated cyclohexyl, deuterated 4-methylcyclohexyl, deuterated 4,4-dimethylcyclohexyl, deuterated adamantyl, and deuterated cycloheptyl.

[0222] The halogen atom mentioned in this invention refers to a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom.

[0223] The C2 to C of this invention 10 Alkenyl refers to vinyl, allyl, 1-butenyl, 2-butenyl, 3-butenyl, 1,3-butadienyl, 1-methylvinyl, styryl, 2,2-diphenylvinyl, 1,2-diphenylvinyl, 1,1-dimethylallyl, 1-methylallyl, 2-methylallyl, 1-phenylallyl, 2-phenylallyl, 3,3-diphenylallyl, 1,2-dimethylallyl, 1-phenyl-1-butenyl, and 3-phenyl-1-butenyl, etc., but is not limited to these.

[0224] In this invention, the substituents used for the substituent groups are selected from one or more of the following: deuterium, cyano, adamantyl, methyl, ethyl, n-propyl, isopropyl, tert-amyl, tert-butyl, n-butyl, isobutyl, sec-butyl, methoxy, phenyl, diphenyl, naphthyl, anthracene, phenanthrene, furanyl, thiophene, indolyl, pyrrole, dibenzofuranyl, dibenzothiophene, 9,9-dimethylfluorenyl, spirofluorenyl, carbazole, N-phenylcarbazole, diphenylamino, 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthyl, deuterated methyl, deuterated ethyl, deuterated isopropyl, and deuterated tert-butyl.

[0225] The red, green, blue, and cyan light-emitting devices of the present invention can be bottom-emitting organic electroluminescent devices, top-emitting organic electroluminescent devices, and multilayered organic electroluminescent devices, without any specific limitation.

[0226] The red, green, blue, and cyan light-emitting devices of this invention each include a substrate, a first electrode, a multilayer organic thin film layer, and a second electrode. The multilayer organic thin film layer includes a hole transport region, a light-emitting region, and an electron transport region. The hole transport region includes a hole injection layer, a hole transport layer, and an electron blocking layer. The electron transport region includes a hole blocking layer, an electron transport layer, and an electron injection layer. Additionally, a CPL layer may be disposed on the second electrode.

[0227] The first electrode can be either an anode or a cathode, and the second electrode can be either a cathode or an anode.

[0228] As the substrate for this invention, any substrate commonly used in organic electroluminescent devices can be used. Examples include transparent substrates, such as glass or transparent PI film substrates; and opaque substrates, such as silicon substrates. Different substrates have different mechanical strengths, thermal stability, transparency, surface smoothness, and water resistance. Their application varies depending on their properties. In this invention, a glass substrate is preferred. There are no particular limitations on the thickness of the substrate.

[0229] The transparent substrate layer 1 can be a glass substrate or a plastic substrate with good mechanical strength, thermal stability, transparency, surface flatness, ease of processing and water resistance;

[0230] The anode layer 2 may be made of a conductor with a high work function (specifically above 4.0 eV) to facilitate hole injection; the anode includes, but is not limited to, metals, metal oxides and / or conductive polymers, such as: nickel, platinum, vanadium, chromium, copper, zinc, silver, gold or alloys, zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium zinc oxide, poly(3-methylthiophene), poly(3,4-(ephthyl-1,2-dioxy)thiophene), polypyrrole, polyaniline, polyimide, polyethylene, polypropylene, polystyrene, polythiophene, polyvinylbenzenesulfonic acid or polyethylene terephthalate, or a combination thereof.

[0231] The cathode layer 9 may be made of a conductor with a low work function (specifically below 3.8 eV) to facilitate electron injection. The cathode includes, but is not limited to, metals, metal oxides, and / or conductive polymers, such as: magnesium, calcium, sodium, potassium, titanium, indium, aluminum, silver, and the like, LiF / Al, LiF / Ca, LiO2 / Al, BaF2 / Ca; the cathode may employ lithium, magnesium, calcium, strontium, aluminum, ytterbium, or indium, or alloys thereof with copper, gold, or silver, or an alternating layer of metals and metal fluorides.

[0232] The hole transport region can be a single-layer structure formed of a single material, a single-layer structure formed of multiple different materials, or a multi-layer structure formed of multiple different materials. For example, the hole transport region can be a single-layer structure formed of different materials, or it can have a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / buffer layer structure, a hole injection layer / buffer layer structure, a hole transport layer / buffer layer structure, a hole injection layer / hole transport layer / electron blocking layer structure, or a hole transport layer / electron blocking layer structure, but the hole transport region is not limited to these. Figure 1 In the process, the hole transport region includes a hole injection layer 3, a hole transport layer 4, and an electron blocking layer 5;

[0233] The hole injection layer material can be selected from one of the following structural formulas (1b), (2b), or (3b):

[0234]

[0235] In general formula (2b), Er1-Er3 are independently represented as substituted or unsubstituted C6-C. 30 aryl, substituted or unsubstituted C2-C 30 One of the heteroaryl groups; Er1-Er3 may be the same or different;

[0236] In general formulas (1b) and (3b), Fr1-Fr6 are independently represented as hydrogen atom, nitrile group, halogen, amide group, alkoxy group, ester group, nitro group, substituted or unsubstituted C1-C group, respectively.10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C6-C 30 aryl, substituted or unsubstituted C2-C 30 One of the heteroaryl groups.

[0237] The hole transport layer material can be selected from one of the following compounds: carbazole, fluorene, pyrazoline, furan, thiophene, xanthracene, dimethyl anthracene, and triarylamine.

[0238] Electron blocking layer materials can be selected from triarylamine derivatives, fluorene derivatives, spirofluorene derivatives, dibenzofuran derivatives, carbazole derivatives, etc.

[0239] The electron transport region includes one or more of a hole blocking layer, an electron transport layer, and an electron injection layer; for example, the electron transport region may have an electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, but is not limited thereto; Figure 1 In the process, the electron transport region includes a hole blocking layer 7, an electron transport layer 8, and an electron injection layer 9;

[0240] The material for the electron injection layer can be a compound containing lithium or cesium.

[0241] The material of the electron transport layer can be selected from one of the following: pyrimidines, pyridines, naphthalenes, anthracenes, phenanthrenes, triazines, quinolines, dibenzofurans, dibenzothiophenes, fluorenes, spirofluorenes, benzothiophenes, benzofurans, and benzimidazolyl groups. Further, the material of the electron transport layer can be any one of the compounds shown in the following general formulas (1C), (2C), (3C), (4C), or (5C):

[0242]

[0243] Among them, Dr1-Dr in general formulas (1C), (2C), (3C), (4C) or (5C) 10 Represented independently as hydrogen atoms, substituted or unsubstituted C6-C atoms. 30 aryl, substituted or unsubstituted C2-C 30 Any one of the heteroaryl groups;

[0244] Hole-blocking layer materials can be triazine derivatives, azirbenzene derivatives, etc.; but are not limited to these.

[0245] The light-emitting layer can be disposed above the hole transport region. The thickness of the light-emitting layer can be 5-60 nm, preferably 10-50 nm, and more preferably 20-45 nm.

[0246] The luminescent layer can use the same guest material or multiple guest materials. The guest material can be a simple fluorescent material, a delayed fluorescence (TADF) material, or a phosphorescent material, or a combination of different fluorescent materials, TADF materials, and phosphorescent materials. The luminescent layer can be a single luminescent layer material or a composite luminescent layer material stacked horizontally or vertically.

[0247] The host material in the luminescent layer not only needs to possess bipolar charge transport characteristics, but also needs to have an appropriate energy level to effectively transfer the excitation energy generated by electron-hole recombination to the guest material. Examples of host materials are selected from, but not limited to, stilbene aryl derivatives, stilbene derivatives, carbazole derivatives, triarylamine derivatives, anthracene derivatives, pyrene derivatives, triazine derivatives, xanthone derivatives, triphenylene derivatives, azirbenzene derivatives, hexabenzobenzene derivatives, or bis(2-methyl-8-quinoline)(p-phenylphenol)aluminum (BAlq), etc.

[0248] As a fluorescent material capable of producing fluorescence, it not only needs to have extremely high fluorescence quantum luminescence efficiency, but also needs to have an appropriate energy level to effectively absorb the excitation energy of the host material and emit light. Such materials are not particularly limited and include, but are not limited to, stilbene amine derivatives, pyrene derivatives, anthracene derivatives, triazine derivatives, xanthone derivatives, benzoxazole derivatives, benzothiazole derivatives, benzimidazole derivatives, chrysodium derivatives, diazoxide phenanthrene derivatives, stilbene benzene derivatives, or tetraphenylbutadiene derivatives, etc. Among them, 4,4'-bis[2-(9-ethylcarbazole-2-yl)-vinyl]biphenyl (BCzVBi), perylene, etc. can be used. Other examples include tetraphenyl compounds, diphenyl compounds, benzimidazole compounds, benzoxazole compounds, benzoxadiazole compounds, styrene-based compounds, bistyrene-pyrazine compounds, butadiene compounds, naphthalene-dicarboximide compounds, perillene compounds, aldehyde-azo compounds, cyclopentadiene compounds, pyrrolopyrrole-based compounds, styrene-based compounds, coumarin compounds, aromatic xylene-theophylline compounds, metal coordination compounds with 8-quinolinephenol as ligands, or polyphenylene compounds, either alone or in combination of two or more. Specific examples that can be listed are aromatic xylene-theophylline compounds, such as 4,4'-bis(2,2-di-1-butylphenylvinyl)bisphenyl (abbreviated as: DTBPBBi) or 4,4'-bis(2,2-diphenylvinyl)bisphenyl (abbreviated as: DPVBi) and their derivatives.

[0249] The content (doping amount) of fluorescent guest material relative to the fluorescent host material is preferably 0.01% to 20% by weight, more preferably 0.1% to 10% by weight.

[0250] The luminescent layer can use not only the aforementioned fluorescent luminescent materials, but also phosphorescent materials. Compared to fluorescent luminescent materials, phosphorescent luminescent materials can utilize both singlet and triplet excitons simultaneously during the luminescence process, theoretically achieving an internal quantum efficiency of 100%, thereby significantly improving the luminescence efficiency of the light-emitting device.

[0251] As a blue phosphorescent guest material, any substance possessing blue phosphorescence emission function is acceptable, without particular limitation. Examples include metal complexes of iridium, titanium, platinum, rhenium, palladium, etc. Preferably, at least one ligand of the aforementioned metal complex has a phenylpyridine backbone, a dipyridine backbone, a porphyrin backbone, etc. More specifically, examples include bis[4,6-difluorophenylpyridine-N,C2']-methylpyridine iridium, tris[2-(2,4-difluorophenyl)pyridine-N,C2']iridium, bis[2-(3,5-trifluoromethyl)pyridine-N,C2']-methylpyridine iridium, or bis[4,6-difluorophenylpyridine-N,C2']acetylacetone iridium.

[0252] As a green phosphorescent guest material, any substance with green phosphorescent luminescence function is acceptable, without particular limitations. For example, metal complexes of iridium, niobium, platinum, rhenium, palladium, etc. can be cited. Furthermore, complexes with at least one ligand of the aforementioned metal complexes having a phenylpyridine backbone, a dipyridine backbone, a porphyrin backbone, etc., can be cited as green phosphorescent dopants. More specifically, facet-tris(2-phenylpyridine)iridium (Ir(ppy)3), bis[2-phenylpyridine-N,C2']-acetylacetone iridium, or facet-tris[5-fluoro-2-(5-trifluoromethyl-2-pyridine)phenyl-C,N]iridium, etc., can be cited.

[0253] Examples of red phosphorescent guest materials include octaethylporphyrin platinum(II) (PtOEP), tris(2-phenylisoquinoline)iridium (Ir(piq)3), and bis(2-(2'-benzothiophene)-pyridine-N,C3')iridium (acetylacetone compound) (Btp2Ir(acac)).

[0254] The content (doping amount) of the phosphorescent guest material is preferably 0.01% to 30% by weight, more preferably 0.1% to 20% by weight, relative to the phosphorescent host material. When using a green phosphorescent guest material, it is preferably 0.1% to 20% by weight, relative to the phosphorescent host material.

[0255] Furthermore, as the host material for phosphorescence, any material whose triplet energy is greater than that of the phosphorescent dopant can be used; there are no particular limitations. Examples include carbazole derivatives, diazophenanthrene derivatives, triazine derivatives, triazole derivatives, and hydroxyquinoline metal complexes. Specifically, examples include 4,4',4”-tris(9-carbazolyl)triphenylamine, 4,4'-bis(9-carbazolyl)-2,2'-dimethylbiphenyl, 2,9-dimethyl-4,7-diphenyl-1,10-o-diazophenanthrene (BCP), 3-phenyl-4-(1'-naphthyl)-5-phenylcarbazole, tris(8-hydroxyquinoline)aluminum (Alq3), or bis-(2-methyl-8-hydroxyquinoline-4-(phenylphenol)aluminum), etc.

[0256] In addition to the fluorescent or phosphorescent host-guest materials used in the light-emitting layer, the light-emitting layer material can also be a non-host-guest doped system material, such as excitocomplex energy transfer and interfacial luminescence; the light-emitting layer material can also be a host-guest material with thermally activated delayed fluorescence (TADF) function, as well as a combination of TADF functional materials and the aforementioned fluorescent and phosphorescent materials.

[0257] On the other hand, the luminescent layer 6 comprises a host material and a guest material. The host material can be composed of a single material or a mixture of multiple materials with different structures; the host material can be one or more of the following compounds: ketones, pyridines, pyrimidines, pyrazines, triazines, carbazoles, fluorenes, quinolines, furans, thiophenes, imidazoles, and acridines. The guest material is selected as an Ir or Pt phosphorescent material, or a boron-containing fluorescent material with a narrow-spectrum fluorescent material having a half-width of less than 40 nm, and its emission color can be blue, green, cyan, or red.

[0258] Boron-containing fluorescent materials have narrow half-widths (WHMs) in their spectra, similar to those of conventional fluorescent materials. However, their WHMs are much narrower than those of current delayed fluorescent materials (around 100 nm), indicating that these compounds have higher color purity and luminescence efficiency.

[0259] Furthermore, the main material can be represented by the following general formula:

[0260]

[0261] Among them, R8~R 12 and R1*~R 12 * Represented independently as hydrogen atoms, substituted or unsubstituted C3-C atoms. 10 cycloalkyl, substituted or unsubstituted C3-C 10 Heterocyclic alkyl, substituted or unsubstituted C6-C 30 aryl, substituted or unsubstituted C2-C 30It is one of the heteroaryl groups, and R8 and R9 can be bonded into a ring or not;

[0262] Ar3 represents C6-C that has been substituted or not substituted. 30 aryl, substituted or unsubstituted C2-C 30 One of the heteroaryl groups; n = 0, 1, or 2;

[0263] Z represents one of the following: an oxygen atom, a sulfur atom, a C1-10 straight-chain alkyl-substituted alkylene group, a C1-10 branched alkyl-substituted alkylene group, an aryl-substituted alkylene group, an aryl-substituted alkyl group, or an aryl-substituted tertiary amine group.

[0264] At least one of the red, green, blue, and cyan luminescent layers contains a sensitizing material, which, together with the host and guest materials, constitutes a sensitized luminescent material assembly. The sensitizing material is a phosphorescent sensitizer, which contains Ir or Pt-based complexes. The final luminescent carrier of the phosphorescent sensitized device is a narrow-spectrum fluorescent material, such as a boron-containing fluorescent material. Alternatively, the sensitizing material can be a thermally activated delayed fluorescence sensitizer, which contains a donor and acceptor framework. The final luminescent carrier of the TADF sensitized device is a narrow-spectrum fluorescent material, such as a boron-containing fluorescent material.

[0265] The methods for forming the layers of the red, green, blue, and cyan light-emitting devices of this invention can employ vacuum evaporation, spin coating, drop casting, inkjet printing, laser printing, or LB film methods. When vacuum deposition is used, deposition temperatures in the range of approximately 100°C to approximately 500°C can be achieved at approximately... to Vacuum deposition is performed at a deposition rate within the range of 2000–5000 rpm and a temperature within the range of 20–200 °C when spin coating is used to form a film.

[0266] In the organic electroluminescent device of the present invention, the thickness of each thin film is not limited. Generally speaking, if the film is too thin, it is easy to produce defects such as pinholes. Conversely, if it is too thick, a high applied voltage is required and the efficiency deteriorates. Therefore, the range of 0.1-1000 nm is usually preferred. Detailed implementation method:

[0268] Methods for fabricating organic electroluminescent devices:

[0269] The present invention provides a method for fabricating the aforementioned organic electroluminescent device, comprising sequentially laminating a first electrode, a multilayer organic thin film layer, and a second electrode on a substrate. The multilayer organic thin film layer is formed by sequentially laminating a hole transport region, a light-emitting layer, and an electron transport region on the first electrode from bottom to top. The hole transport region is formed by sequentially laminating a hole injection layer, a hole transport layer, and an electron blocking layer on the first electrode from bottom to top, and the electron transport region is formed by sequentially laminating a hole blocking layer, an electron transport layer, and an electron injection layer on the light-emitting layer from bottom to top. Optionally, a CPL layer may also be laminated on the second electrode to improve the light extraction efficiency of the organic electroluminescent device.

[0270] Regarding lamination, methods such as vacuum deposition, vacuum evaporation, spin coating, casting, LB method, inkjet printing, laser printing, or LITI can be used, but are not limited to these. Among them, vacuum evaporation refers to heating the material and depositing it onto the substrate in a vacuum environment.

[0271] In this invention, vacuum evaporation is preferably used to form the various layers, wherein the vapor deposition process can be carried out at a temperature of about 100-500°C for about 10... -8 -10 -2 The vacuum degree and about Vacuum evaporation is performed at a rate of [missing information]. The vacuum level is preferably 10 [missing information]. -6 -10 -2 Torr, more preferably 10 -5 -10 -3 Torr.

[0272] The rate is approximately More preferably, about

[0273] In addition, it should be noted that the materials used to form each layer described in this invention can be used as a single layer by forming a film on their own, or they can be used as a single layer by mixing with other materials to form a film. They can also be a stacked structure between layers that are formed on their own, a stacked structure between layers that are formed by mixing, or a stacked structure between layers that are formed on their own and layers that are formed by mixing.

[0274] Full-color organic electroluminescent display device solution:

[0275] The full-color organic electroluminescent display device includes independently controlled red, green, blue, and cyan light-emitting devices, which are stacked horizontally or vertically. The full-color organic electroluminescent display device may also include at least one thin-film transistor. The thin-film transistor may include a gate electrode, a source electrode, a drain electrode, a gate insulating layer, and an active layer, wherein one of the source and drain electrodes may be electrically connected to the first electrode of the organic electroluminescent device. The active layer may include crystalline silicon, amorphous silicon, organic semiconductor, or oxide semiconductor, but is not limited thereto.

[0276] Exemplary embodiments have been disclosed herein. While specific terminology has been used, it is intended and interpreted in a general and descriptive sense only, and not for limiting purposes. In some instances, as will be apparent to those skilled in the art upon the filing of this application, features, characteristics, and / or elements described in connection with particular embodiments may be used alone or in combination with features, characteristics, and / or elements described in connection with other embodiments, unless specifically indicated otherwise. Accordingly, those skilled in the art will understand that various changes in form and detail may be made without departing from the spirit and scope of the invention.

[0277] The following examples are intended to better explain the present invention, but the scope of the invention is not limited thereto.

[0278] Synthesis Examples

[0279] All raw materials involved in the synthesis embodiments of the present invention can be purchased from the market or obtained by conventional preparation methods in the art;

[0280] Synthesis of intermediate e1:

[0281]

[0282] In a three-necked flask under nitrogen protection, starting material a1 (10 mmol, 2.49 g), starting material b1 (10 mmol, 3.39 g), zinc bromide (25 mmol, 5.63 g), and 180 mL of anhydrous toluene were added, and the mixture was heated to 120 °C and reacted for 19 hours. After cooling to room temperature, the mixture was concentrated and purified by silica gel column chromatography to obtain intermediate c1.

[0283] Intermediate c1 (2.5 mmol, 1.15 g) was dissolved in 50 mL of tetrahydrofuran (THF) solution. Under nitrogen purging at 0 °C, 1.6 mL of n-butyllithium (1.6 M) n-hexane solution was slowly added. After stirring at 0 °C for 3.5 hours, 5 mL of tetrahydrofuran solution of starting material d1 (2.8 mmol, 0.50 g) was slowly added. The reaction mixture was then slowly heated to room temperature and stirred overnight. Dilute hydrochloric acid solution, distilled water, and ethyl acetate were added to the reaction mixture. The aqueous layer was separated and extracted three times with ethyl acetate. The combined organic layers were dried over sodium sulfate and filtered. After removing the solvent under reduced pressure, the crude product was dissolved in anhydrous dichloromethane, and then 47% boron trifluoride-diethyl ether was slowly added. The reaction mixture was stirred overnight and slowly quenched with an aqueous solution of NaHCO3. The aqueous layer was then separated and extracted with dichloromethane. The product was dried over sodium sulfate, filtered, and evaporated by rotary evaporation. The solution was then column-purified to give intermediate e1.

[0284] Synthesis of intermediate e2:

[0285]

[0286] In a three-necked flask under nitrogen protection, the following ingredients were added: O2 (10 mmol, 2.69 g), P2 (10 mmol, 1.57 g), CuI (0.1 mmol, 19 mg), Pd(PPh3)2Cl2 (0.2 mmol, 145 mg), N,N-diisopropylethylamine (0.7 mmol, 90 mg), and 100 mL of anhydrous DMF. The reaction was carried out at 80 °C for 15 hours. After cooling to room temperature, the reaction was quenched with 1 mL of water, concentrated, and purified by silica gel column chromatography to obtain intermediate Q2.

[0287] In a three-necked flask under nitrogen protection, intermediate Q2 (5 mmol, 1.50 g), silver nitrate (0.5 mmol, 85 mg), and 30 mL of acetonitrile:water (2:1) mixed solution were added, and the mixture was reacted at 100 °C for 28 hours. After cooling to room temperature, the mixture was concentrated and purified by silica gel column chromatography to obtain intermediate a2.

[0288] The synthesis of intermediate c2 is similar to that of intermediate c1, except that intermediate a2 is used to replace the raw material a1.

[0289] The synthesis of intermediate e2 is similar to that of intermediate e1, except that intermediate c1 is replaced by intermediate c2.

[0290] Synthesis of intermediate C3:

[0291]

[0292] In a two-necked flask, reactants a3 (2.15 g, 8 mmol), b3 (1.19 g, 8 mmol), Pd2(dba)3 (0.5 mmol, 0.46 g), tri-tert-butylphosphine tetrafluoroborate (1 mmol, 0.29 g), sodium tert-butoxide (30 mmol, 2.88 g), and toluene (160 mL) were added. The mixture was degassed by a vacuum-nitrogen purging cycle and then heated under reflux for 29 hours. After the reaction system cooled to room temperature, the reaction mixture was filtered through a silica gel pad and then concentrated under vacuum. The crude product was further purified by column chromatography and dried under vacuum to obtain intermediate c3.

[0293] Synthesis of intermediate C4:

[0294]

[0295] The synthesis of intermediate c4 is similar to that of intermediate c3, except that raw material a4 is used instead of raw material a3.

[0296] Synthesis of intermediate C5:

[0297]

[0298] The synthesis of intermediate c5 is similar to that of intermediate c3, except that raw material b5 is used instead of raw material b3.

[0299] Synthesis of compound 6:

[0300]

[0301] Add raw material f1 (20 mmol, 5.31 g) and cesium carbonate (55.2 mmol, 17.99 g) to a two-necked flask. Add 175 mL of anhydrous DMF under nitrogen protection and stir at room temperature for 75 minutes. Add intermediate e1 (20 mmol, 10.88 g) under nitrogen protection. Reflux the solution under magnetic stirring for 36 hours. Cool, filter, wash with water, dry, and pass through a column to obtain intermediate g1.

[0302] Intermediate g1 (1.58 g, 2 mmol), starting material h1 (0.56 g, 2 mmol), Pd2(dba)3 (0.15 mmol, 0.14 g), tri-tert-butylphosphine tetrafluoroborate (0.25 mmol, 0.07 g), sodium tert-butoxide (7.5 mmol, 0.72 g), and toluene (60 mL) were added to a two-necked flask. The mixture was degassed by a vacuum-nitrogen purging cycle and then heated under reflux for 23 hours. After the reaction system cooled to room temperature, the reaction mixture was filtered through a silica gel pad and then concentrated under vacuum. The crude product was further purified by column chromatography and dried under vacuum to obtain intermediate i1.

[0303] In a three-necked flask under nitrogen protection, intermediate i1 (10 mmol, 9.90 g) and 160 mL of o-dichlorobenzene were added. A 2.5 M solution of tert-butyllithium in n-hexane (12 mmol, 4.8 mL) was added at -78 °C, the system was heated to 68 °C and reacted for 7.5 h. Then, boron tribromide (15 mmol, 1.5 mL) was added at 0 °C, and the reaction was continued at room temperature for 8.5 h. Next, N,N-diisopropylethylamine (20 mmol, 3.5 mL) was added at 0 °C, the system was heated to 210 °C and reacted for 16.5 h. After the reaction was complete, the organic layer was concentrated under reduced pressure and then purified by silica gel column chromatography to give compound 6. Compound 6 was reacted in toluene solution (1 × 10⁻⁶) -5 The half-width at half maximum (WHM) was 21 nm, obtained by measuring a Horiba Fluorolog-3 series fluorescence spectrometer.

[0304] Synthesis of compound 7:

[0305]

[0306] The synthesis of intermediate i2 is similar to that of intermediate i1, except that intermediate c3 is used to replace raw material h1.

[0307] The synthesis of compound 7 is similar to that of compound 6, except that intermediate i1 is replaced by intermediate i2. Compound 7 is synthesized in toluene solution (1×10⁻⁶). -5 The half-width of the peak (M) was 20 nm, obtained by measuring the peak using a Horiba Fluorolog-3 series fluorescence spectrometer.

[0308] Synthesis of compound 27:

[0309]

[0310] The synthesis of intermediate i3 is similar to that of intermediate i1, except that intermediate c4 is used to replace raw material h1.

[0311] The synthesis of compound 27 is similar to that of compound 6, except that intermediate i1 is replaced by intermediate i3. Compound 27 is synthesized in toluene solution (1×10⁻⁶). -5 The half-width at half maximum (WHM) was 21 nm, obtained by measuring a Horiba Fluorolog-3 series fluorescence spectrometer.

[0312] Synthesis of compound 28:

[0313]

[0314] The synthesis of intermediate i4 is similar to that of intermediate i1, except that intermediate c5 is used to replace the raw material h1.

[0315] The synthesis of compound 28 is similar to that of compound 6, except that intermediate i1 is replaced by intermediate i4. Compound 28 is synthesized in toluene solution (1×10⁻⁶). -5 The half-width of the M peak was 22 nm, obtained by measuring the peak width using a Horiba Fluorolog-3 series fluorescence spectrometer.

[0316] Synthesis of compound 29:

[0317]

[0318] The synthesis of intermediate g5 is similar to that of intermediate g1, except that intermediate e2 is used instead of intermediate e1.

[0319] The synthesis of intermediate i5 is similar to that of intermediate i1, except that raw material h5 is used to replace raw material h1, and intermediate g5 is used to replace intermediate g1.

[0320] The synthesis of compound 29 is similar to that of compound 6, except that intermediate i1 is replaced by intermediate i5. Compound 29 is synthesized in toluene solution (1×10⁻⁶). -5 The half-width at half maximum (WHM) was 21 nm, obtained by measuring a Horiba Fluorolog-3 series fluorescence spectrometer.

[0321] Synthesis of compound 30:

[0322]

[0323] Add raw material f6 (20 mmol, 4.88 g) and cesium carbonate (55.2 mmol, 17.99 g) to a two-necked flask. Add 170 mL of anhydrous DMF under nitrogen protection and stir at room temperature for 55 minutes. Add intermediate e1 (20 mmol, 10.88 g) under nitrogen protection. Reflux the solution under magnetic stirring for 32 hours. Cool, filter, wash with water, dry, and pass through a column to obtain intermediate g6.

[0324] Intermediate G6 (2 mmol, 1.54 g), intermediate C3 (2 mmol, 0.68 g), Pd2(dba)3 (0.15 mmol, 0.14 g), tri-tert-butylphosphine tetrafluoroborate (0.25 mmol, 0.07 g), sodium tert-butoxide (7.5 mmol, 0.72 g), and toluene (70 mL) were added to a two-necked flask. The mixture was degassed by a vacuum-nitrogen purging cycle and then heated under reflux for 26 hours. After the reaction system cooled to room temperature, the reaction mixture was filtered through a silica gel pad and then concentrated under vacuum. The crude product was further purified by column chromatography and dried under vacuum to obtain intermediate H6.

[0325] Intermediate h6 (10 mmol, 10.24 g) was dissolved in 50 mL of tetrahydrofuran (THF) solution. Under nitrogen purging at -78 °C, 4.7 mL of n-butyllithium (2.5 M, 11.7 mmol) n-hexane solution was slowly added. After stirring at -78 °C for 4.5 hours, 30 mL of tetrahydrofuran solution of starting material d1 (10 mmol, 1.80 g) was slowly added. The reaction mixture was then slowly heated to room temperature and stirred overnight. 30 mL of dilute hydrochloric acid (1.0 M), distilled water, and ethyl acetate were added to the reaction mixture. The aqueous layer was separated and extracted three times with ethyl acetate. The combined organic layers were dried over sodium sulfate and filtered. After removing the solvent under reduced pressure, the crude product was dissolved in anhydrous dichloromethane, and then 47% boron trifluoride-diethyl ether was slowly added. The reaction mixture was stirred overnight and then slowly quenched with an aqueous sodium bicarbonate (NaHCO3) solution. Next, the aqueous layer was separated, extracted with dichloromethane, dried with sodium sulfate, filtered, distilled under reduced pressure, and passed through a column to obtain intermediate i6.

[0326] In a three-necked flask under nitrogen protection, intermediate I6 (10 mmol, 11.52 g) and 140 mL of o-dichlorobenzene were added. A 2.5 M solution of tert-butyllithium in n-hexane (12 mmol, 4.8 mL) was added at -78 °C, the system was heated to 68 °C and reacted for 6 hours. Then, boron tribromide (15 mmol, 1.5 mL) was added at 0 °C, and the mixture was transferred to room temperature and reacted for another 8 hours. Next, N,N-diisopropylethylamine (20 mmol, 3.5 mL) was added at 0 °C, the system was heated to 220 °C and reacted for 15 hours. After the reaction was complete, the organic layer was concentrated under reduced pressure and then purified by silica gel column chromatography to give compound 30. Compound 30 was reacted in toluene solution (1 × 10⁻⁶) -5 The half-width of the M peak was 22 nm, obtained by measuring the peak width using a Horiba Fluorolog-3 series fluorescence spectrometer.

[0327] Synthesis of compound 31:

[0328]

[0329] The synthesis of intermediate h7 is similar to that of intermediate h6, except that intermediate c3 is replaced by raw material h1.

[0330] The synthesis of intermediate i7 is similar to that of intermediate i6, except that intermediate h6 is replaced by intermediate h7.

[0331] The synthesis of compound 31 is similar to that of compound 30, except that intermediate i6 is replaced by intermediate i7. Compound 31 is synthesized in toluene solution (1×10⁻⁶). -5The half-width of the M peak was 22 nm, obtained by measuring the peak width using a Horiba Fluorolog-3 series fluorescence spectrometer.

[0332] Synthesis of compound 32:

[0333]

[0334] In a two-necked flask, reactants a8 (8 mmol, 2.68 g), b8 (8 mmol, 1.35 g), toluene (80 mL), Pd2(dba)3 (0.5 mmol, 0.46 g), tri-tert-butylphosphine tetrafluoroborate (1 mmol, 0.29 g), and sodium tert-butoxide (30 mmol, 2.88 g) were added. The mixture was degassed by a vacuum-nitrogen purging cycle and then heated under reflux for 20 hours. After the reaction mixture cooled to room temperature, it was filtered through a silica gel pad and then concentrated under vacuum. The crude product was further purified by column chromatography and dried under vacuum to obtain intermediate c8.

[0335] The synthesis of intermediate g8 is similar to that of intermediate g1, except that intermediate c8 is used to replace the raw material f1.

[0336] The synthesis of intermediate i8 is similar to that of intermediate i1, except that intermediate g1 is replaced by intermediate g8.

[0337] The synthesis of compound 32 is similar to that of compound 6, except that intermediate i1 is replaced by intermediate i8. Compound 32 is synthesized in toluene solution (1×10⁻⁶). -5 The half-width at half maximum (WHM) was 23 nm, obtained by measuring a Horiba Fluorolog-3 series fluorescence spectrometer.

[0338] Synthesis of compound 33:

[0339]

[0340] The synthesis of intermediate g9 is similar to that of intermediate g6, except that raw material f9 is used to replace raw material f6, and raw material O9 is used to replace intermediate e1.

[0341] The synthesis of intermediate h9 is similar to that of intermediate h6, except that intermediate g6 is replaced by intermediate g9.

[0342] The synthesis of intermediate i9 is similar to that of intermediate i6, except that intermediate h6 is replaced by intermediate h9.

[0343] The synthesis of compound 33 is similar to that of compound 30, except that intermediate i6 is replaced by intermediate i7. Compound 33 is synthesized in toluene solution (1×10⁻⁶). -5The half-width at half maximum (WHM) was 21 nm, obtained by measuring a Horiba Fluorolog-3 series fluorescence spectrometer.

[0344] Synthesis of compound 34:

[0345]

[0346] The synthesis of intermediate h10 is similar to that of intermediate h6, except that intermediate g6 is replaced by intermediate g9 and intermediate c3 is replaced by intermediate c4.

[0347] The synthesis of intermediate i10 is similar to that of intermediate i6, except that intermediate h6 is replaced by intermediate h10.

[0348] The synthesis of compound 34 is similar to that of compound 30, except that intermediate i6 is replaced by intermediate i10. Compound 34 is synthesized in toluene solution (1×10⁻⁶). -5 The half-width of the M peak was 22 nm, obtained by measuring the peak width using a Horiba Fluorolog-3 series fluorescence spectrometer.

[0349] The structural characterization of the compounds obtained in each embodiment is shown in Table 1.

[0350] Table 1

[0351]

[0352] Fabrication and performance testing results of organic electroluminescent devices:

[0353] The molecular structure of the materials used in the device fabrication process is shown below:

[0354]

[0355]

[0356] Red glowing layer:

[0357]

[0358] Green luminescent layer:

[0359]

[0360] Blue glowing layer:

[0361]

[0362] Cyan luminescent layer:

[0363]

[0364] 1.1 Fabrication of Comparative Device 1-1 (Red Light Emitting Device)

[0365] a) An anode layer 2 (Ag(100nm)) is formed by vacuum evaporation on glass substrate layer 1;

[0366] b) On the anode layer 2, HT-3 and HI-1 with a film thickness of 10 nm are deposited using a vacuum evaporation apparatus as hole injection layer 3, with the mass ratio of HT-3 to HI-1 being 97:3.

[0367] c) On the hole injection layer 3, a 140 nm thick HT-3 is then deposited as the hole transport layer 4.

[0368] d) On hole transport layer 4, an 85 nm thick EB-1 layer is subsequently deposited as electron blocking layer 5;

[0369] e) On the electron blocking layer 5, the light-emitting layer 6 of the organic electroluminescent device is fabricated. The red light-emitting layer material is deposited by vacuum evaporation. The host material is RH-1, the guest material is RPD-1, the mass ratio is 97:3, and the thickness is 40nm.

[0370] f) On the light-emitting layer 6, HB-2 is vacuum-deposited with a film thickness of 5nm. This layer is the hole blocking layer 7.

[0371] g) On the hole blocking layer 7, ET-3 and Liq are vacuum-deposited with a mass ratio of 1:1 and a film thickness of 30nm. This layer is the electron transport layer 8.

[0372] h) On the electron transport layer 8, a LiF layer with a thickness of 1 nm is fabricated by vacuum evaporation equipment. This layer is the electron injection layer 9.

[0373] i) On the electron injection layer 9, a Mg:Ag electrode layer with a thickness of 16 nm is fabricated by vacuum evaporation device, with a Mg:Ag mass ratio of 1:9. This layer is used as the cathode layer 10.

[0374] j) A 65 nm CP-1 layer is vacuum-deposited on the cathode layer 10 as the CPL layer 11.

[0375] Preparation of Device Example 1-1: Repeat the steps of Comparative Example 1-1, except that in step e), an organic electroluminescent device light-emitting layer 6 is fabricated on the electron blocking layer 5. A red light-emitting layer material is deposited by vacuum evaporation. The host material is RH-1, the sensitizer is RPD-1, and the guest material is RD-1. The mass ratio of host material: sensitizer: guest material is 91.2:8:0.8, and the thickness is 40 nm.

[0376] Preparation of Device Examples 1-2: The steps of Comparative Example 1-1 were repeated, except that in step e), an organic electroluminescent device light-emitting layer 6 was fabricated on the electron blocking layer 5. A red light-emitting layer material was deposited by vacuum evaporation. The host material was RH-1, the sensitizer was RPD-1, and the guest material was RD-2. The mass ratio of host material: sensitizer: guest material was 91.2:8:0.8, and the thickness was 40 nm.

[0377] Preparation of devices in Examples 1-3: The steps of Comparative Example 1-1 were repeated, except that in step e), an organic electroluminescent device light-emitting layer 6 was fabricated on the electron blocking layer 5. A red light-emitting layer material was deposited by vacuum evaporation. The host material was RH-1, the sensitizer was RPD-1, and the guest material was RD-3. The mass ratio of host material: sensitizer: guest material was 91.2:8:0.8, and the thickness was 40 nm.

[0378] The specific structures and device performance of the above-mentioned device comparative example 1-1 and device examples 1-1 to 1-3 are shown in Tables 2-1 and 2-2.

[0379] Table 2-1

[0380]

[0381] Table 2-2

[0382]

[0383] 1.2 Fabrication of Comparative Device Example 2-1 (Green Light-Emitting Device)

[0384] a) An anode layer 2 (Ag(100nm)) is formed by vacuum evaporation on glass substrate layer 1;

[0385] b) On the anode layer 2, HT-4 and HI-1 with a film thickness of 10 nm are deposited using a vacuum evaporation device as hole injection layer 3, with the mass ratio of HT-4 to HI-1 being 97:3.

[0386] c) On the hole injection layer 3, a 140 nm thick HT-4 is then deposited as the hole transport layer 4.

[0387] d) On hole transport layer 4, a 45 nm thick EB-2 layer is subsequently deposited as electron blocking layer 5;

[0388] e) On the electron blocking layer 5, the light-emitting layer 6 of the organic electroluminescent device is fabricated by vacuum evaporation. The green light-emitting layer material is deposited by vacuum evaporation. The main material is GH-N and GH-P, the guest material is GPD-1, the mass ratio of GH-N, GH-P and GPD-1 is 47:47:6, and the thickness is 40nm.

[0389] f) On the light-emitting layer 6, HB-2 is vacuum-deposited with a film thickness of 5nm. This layer is the hole blocking layer 7.

[0390] g) On the hole blocking layer 7, ET-3 and Liq are vacuum-deposited with a mass ratio of 1:1 and a film thickness of 30nm. This layer is the electron transport layer 8.

[0391] h) On the electron transport layer 8, a LiF layer with a thickness of 1 nm is fabricated by vacuum evaporation equipment. This layer is the electron injection layer 9.

[0392] i) On the electron injection layer 9, a Mg:Ag electrode layer with a thickness of 16 nm is fabricated by vacuum evaporation device, with a Mg:Ag mass ratio of 1:9. This layer is used as the cathode layer 10.

[0393] j) A 65 nm CP-1 layer is vacuum-deposited on the cathode layer 10 as the CPL layer 11.

[0394] Preparation of Device Example 2-1: Repeat the steps of Comparative Example 2-1, except that in step e), an organic electroluminescent device light-emitting layer 6 is fabricated on the electron blocking layer 5 by vacuum evaporation of a green light-emitting layer material, the host material being GH-N and GH-P, the sensitizer being GPD-1, the guest material being GD-1, the mass ratio of GH-N, GH-P, GPD-1 and GD-1 being 47:47:5:1, and the thickness being 40 nm.

[0395] Preparation of Device Example 2-2: Repeat the steps of Comparative Example 2-1, except that in step e), an organic electroluminescent device light-emitting layer 6 is fabricated on the electron blocking layer 5 by vacuum evaporation of a green light-emitting layer material, the host material being GH-N and GH-P, the sensitizer being GPD-1, the guest material being GD-2, the mass ratio of GH-N, GH-P, GPD-1 and GD-2 being 47:47:5:1, and the thickness being 40 nm.

[0396] Preparation of Device Examples 2-3: The steps of Comparative Example 2-1 were repeated, except that in step e), an organic electroluminescent device light-emitting layer 6 was fabricated on the electron blocking layer 5. The green light-emitting layer material was deposited by vacuum evaporation. The host material was GH-N and GH-P, the sensitizer was GPD-1, and the guest material was GD-3. The mass ratio of GH-N, GH-P, GPD-1 and GD-3 was 47:47:5:1, and the thickness was 40 nm.

[0397] The specific structures and device performance of the above-mentioned device comparative example 2-1 and device embodiments 2-1 to 2-3 are shown in Tables 3-1 and 3-2.

[0398] Table 3-1

[0399]

[0400]

[0401] Table 3-2

[0402]

[0403] 1.3 Fabrication of Comparative Device Example 3-1 (Blue Light Emitting Device)

[0404] An anode layer 2 (Ag (100 nm)) is formed by vacuum evaporation on a glass substrate layer 1. On the anode layer 2, HT-1 and HI-1 with a thickness of 10 nm are deposited using a vacuum evaporation apparatus as a hole injection layer 3, with a mass ratio of HT-1 to HI-1 of 97:3. Next, a 130 nm thick layer of HT-1 is deposited as a hole transport layer 4. Subsequently, a 5 nm thick layer of EB-3 is deposited as an electron blocking layer 5. After the electron blocking materials are deposited, a light-emitting layer 6 for the organic electroluminescent device is fabricated. The structure of the light-emitting layer 6 includes BH-2 as the host material and compound BD-1 as the guest material, with a guest material doping ratio of 3% by weight. The light-emitting layer has a thickness of 20 nm. After the light-emitting layer 6, HB-1 is deposited to a thickness of 5 nm as a hole blocking layer 7. On top of the hole blocking layer 7, ET-2 and Liq are deposited with a mass ratio of ET-2 to Liq of 1:1. The vacuum-deposited film of this material is 30 nm thick, and this layer is the electron transport layer 8. On the electron transport layer 8, a 1 nm thick LiF layer is fabricated using a vacuum evaporation apparatus; this layer is the electron injection layer 9. On the electron injection layer 9, a 16 nm thick Mg:Ag electrode layer is fabricated using a vacuum evaporation apparatus, with a Mg to Ag mass ratio of 1:9; this layer is used as the cathode layer 10. On the cathode layer 10, a 65 nm thick CP-1 layer is vacuum-deposited as the CPL layer 11.

[0405] Device Examples 3-1 to 3-2: Repeat the steps of Device Comparative Example 3-1, except that the light-emitting layer 6 is replaced with a sensitizing system;

[0406] The specific structures and device performance of the above-mentioned device comparative example 3-1 and device examples 3-1 to 3-2 are shown in Tables 4-1 and 4-2.

[0407] Table 4-1

[0408]

[0409]

[0410] Table 4-2

[0411]

[0412] 1.4 Fabrication of Device Example 1 (Cyan Light Emitting Device)

[0413] An anode layer 2 (Ag (100 nm)) is formed by vacuum evaporation on a glass substrate layer 1. On the anode layer 2, HT-2 and HI-1 with a thickness of 10 nm are deposited using a vacuum evaporation apparatus as a hole injection layer 3, with a mass ratio of HT-2 to HI-1 of 97:3. Next, a 120 nm thick layer of HT-2 is deposited as a hole transport layer 4. Subsequently, a 10 nm thick layer of EB-4 is deposited as an electron blocking layer 5. After the electron blocking materials are deposited, a light-emitting layer 6 for the organic electroluminescent device is fabricated. The structure of the light-emitting layer 6 includes CH-1 as the host material and compound 6 as the guest material, with a guest material doping ratio of 3% by weight. The light-emitting layer has a thickness of 20 nm. After the light-emitting layer 6, HB-1 is deposited to a thickness of 5 nm as a hole blocking layer 7. On top of the hole blocking layer 7, ET-1 and Liq are deposited with a mass ratio of ET-1 to Liq of 1:1. The vacuum-deposited film of this material is 30 nm thick, and this layer is the electron transport layer 8. On the electron transport layer 8, a 1 nm thick LiF layer is fabricated using a vacuum evaporation apparatus; this layer is the electron injection layer 9. On the electron injection layer 9, a 16 nm thick Mg:Ag electrode layer is fabricated using a vacuum evaporation apparatus, with a Mg to Ag mass ratio of 1:9; this layer is used as the cathode layer 10. On the cathode layer 10, a 65 nm thick CP-2 layer is vacuum-deposited as the CPL layer 11.

[0414] Device Examples 2 to 12: The steps of Device Example 1 are repeated, except that the guest material is replaced. The layer structure and test results of Device Examples 2 to 12 are shown in Table 2-1 and Table 3-1, respectively.

[0415] Comparative Example 1: The steps of Comparative Example 7 were repeated, except that the host material and guest material were replaced. The layer structure and test results of Comparative Example 7 are shown in Table 2-1 and Table 3-1, respectively.

[0416] Fabrication of PTSF-featured cyan light-emitting devices

[0417] The effects of sensitization on the cyan light-emitting device of the present invention are described in detail below using Device Examples 13-24 and Comparative Example 2. The fabrication processes of Device Examples 14-24 and Comparative Example 2 are completely identical to those of Device Example 13, and the same substrate and electrode materials are used. The film thickness of the electrode materials is also kept consistent. The only difference is that the light-emitting layer material in the device is replaced. The layer structure and test results of each device example are shown in Tables 2-2 and 3-2, respectively.

[0418] Device Example 13

[0419] like Figure 1 As shown, an anode layer 2 (Ag (100nm)) is vacuum-deposited on the glass substrate layer 1. On the anode layer 2, HT-2 and HI-1 with a thickness of 10nm are deposited using a vacuum evaporation apparatus as a hole injection layer 3, with a mass ratio of HT-2 to HI-1 of 97:3. Next, a 115nm thick layer of HT-2 is deposited as a hole transport layer 4. Subsequently, a 30nm thick layer of EB-4 is deposited as an electron blocking layer 5. After the electron blocking materials are deposited, the light-emitting layer 6 of the organic electroluminescent device is fabricated, using PH-N and PH-P as host materials, CPD-1 as the first guest material, and compound 6 as the second guest material. The mass ratio of PH-N, PH-P, CPD-1, and compound 6 is 45.6:45.6:8:0.8, and the light-emitting layer thickness is 30nm. After the light-emitting layer 6, HB-1 is vacuum-deposited with a thickness of 5nm; this layer serves as a hole blocking layer 7. Following the hole-blocking layer 7, ET-1 and Liq are vacuum-deposited at a mass ratio of 1:1, with a film thickness of 30 nm. This layer serves as the electron transport layer 8. On the electron transport layer 8, a 1 nm thick LiF layer is fabricated using a vacuum evaporation apparatus. This layer serves as the electron injection layer 9. On the electron injection layer 9, a 16 nm thick Mg:Ag electrode layer is fabricated using a vacuum evaporation apparatus, with a Mg:Ag mass ratio of 1:9. This layer serves as the cathode layer 10. On the cathode layer 10, a 65 nm thick CP-2 layer is vacuum-deposited as the CPL layer 11.

[0420] TSF Feature Cyan OLED Device Fabrication

[0421] The effects of sensitization on the cyan light-emitting device of the present invention are described in detail below using Device Examples 25-36 and Comparative Example 3. Device Examples 26-36 and Comparative Example 3 are manufactured using the same process as Device Example 25, employing the same substrate and electrode materials, and maintaining the same electrode film thickness. The only difference is the replacement of the light-emitting layer material. The layer structures and test results of each device example are shown in Tables 2-3 and 3-3, respectively.

[0422] Device Example 25

[0423] like Figure 1As shown, an anode layer 2 (Ag (100nm)) is vacuum-deposited on the glass substrate layer 1. On the anode layer 2, HT-2 and HI-1 with a thickness of 10nm are deposited using a vacuum evaporation apparatus as a hole injection layer 3, with a mass ratio of HT-2 to HI-1 of 97:3. Next, a 120nm thick layer of HT-2 is deposited as a hole transport layer 4. Subsequently, a 30nm thick layer of EB-4 is deposited as an electron blocking layer 5. After the electron blocking materials are deposited, the light-emitting layer 6 of the organic electroluminescent device is fabricated, using PH-N as the host material, TCH-1 as the first guest material, and compound 6 as the second guest material, with a mass ratio of PH-N, TCH-1, and compound 6 of 96.5:3:0.5. The light-emitting layer has a thickness of 30nm. After the light-emitting layer 6, HB-1 is vacuum-deposited with a thickness of 5nm; this layer serves as a hole blocking layer 7. Following the hole-blocking layer 7, ET-1 and Liq are vacuum-deposited at a mass ratio of 1:1, with a film thickness of 30 nm. This layer serves as the electron transport layer 8. On the electron transport layer 8, a 1 nm thick LiF layer is fabricated using a vacuum evaporation apparatus. This layer serves as the electron injection layer 9. On the electron injection layer 9, a 16 nm thick Mg:Ag electrode layer is fabricated using a vacuum evaporation apparatus, with a Mg:Ag mass ratio of 1:9. This layer serves as the cathode layer 10. On the cathode layer 10, a 65 nm thick CP-2 layer is vacuum-deposited as the CPL layer 11.

[0424] Table 2-1

[0425]

[0426]

[0427] Table 2-2

[0428]

[0429]

[0430] Table 2-3

[0431]

[0432]

[0433]

[0434] Table 3-1

[0435]

[0436] Table 3-2

[0437]

[0438]

[0439] Table 3-3

[0440]

[0441] As can be seen from the device data results in Tables 3-1, 3-2 and 3-3, the current efficiency and lifetime of the sensitized cyan light-emitting device are significantly improved compared with the unsensitized cyan light-emitting device.

[0442] Note: All luminous peak values, current efficiency, index, and color coordinates were measured using an IVL (current-voltage-luminance) testing system (Suzhou Fushida Scientific Instruments Co., Ltd.), with a current density of 10 mA / cm² during testing. 2 The lifetime testing system is the EAS-62C OLED device lifetime tester from System Technology Inc., Japan; LT95 refers to the time it takes for the device brightness to decay to 95%, and the current density during the test is 30 mA / cm². 2 .

[0443] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A full-color organic electroluminescent display device, comprising independently controlled red light-emitting devices, green light-emitting devices, blue light-emitting devices, and cyan light-emitting devices, wherein the red light-emitting device includes a red light-emitting layer, the green light-emitting device includes a green light-emitting layer, the blue light-emitting device includes a blue light-emitting layer, and the cyan light-emitting device includes a cyan light-emitting layer, characterized in that: The red emitting layer comprises a red light host material and a red light guest material; the green emitting layer comprises a green light host material and a green light guest material; the blue emitting layer comprises a blue light host material and a blue light guest material; the cyan emitting layer comprises a cyan light host material and a cyan light guest material; at least one of the red, green, blue, and cyan emitting layers comprises a sensitizing material; and the guest material in the emitting layer comprising the sensitizing material is a fluorescent emitting material.

2. The full-color organic electroluminescent display device according to claim 1, characterized in that, At least one of the red, green, and cyan light-emitting layers contains a sensitizing material, which is a thermally activated delayed fluorescence sensitizer or a phosphorescent sensitizer. Preferably, at least one of the green light-emitting layer and the cyan light-emitting layer contains a sensitizing material; More preferably, the cyan luminescent layer contains a sensitizing material.

3. The full-color organic electroluminescent display device according to claim 1 or 2, characterized in that, The red luminescent layer contains a red light-emitting material that is either a fluorescent or phosphorescent material; the green luminescent layer contains a green light-emitting material that is either a fluorescent or phosphorescent material; the blue luminescent layer contains a blue light-emitting material that is either a fluorescent or phosphorescent material; and the cyan luminescent layer contains a cyan light-emitting material that is either a fluorescent or phosphorescent material. Preferably, the green light-emitting layer contains a green light-emitting material that is a fluorescent light-emitting material, and the cyan light-emitting layer contains a cyan light-emitting material that is a fluorescent light-emitting material. Alternatively, preferably, the cyan luminescent layer contains a cyan luminescent guest material that is a fluorescent luminescent material.

4. The full-color organic electroluminescent display device according to any one of claims 1-3, characterized in that, The CIEx coordinate value of the cyan light-emitting device is smaller than that of the green light-emitting device; And / or, the CIEx coordinate value of the cyan light-emitting device is less than the CIEx coordinate value of the blue light-emitting device.

5. The full-color organic electroluminescent display device according to any one of claims 1-4, characterized in that, The cyan light-emitting device emits light with CIEx coordinates less than 0.1 and CIEy coordinates less than 0.5; Preferably, the cyan light-emitting device emits light with CIEx coordinates less than 0.08 and CIEy coordinates less than 0.44; More preferably, the luminous emission CIEx value of the cyan light-emitting device is between 0.04 and 0.07, and the CIEy value is between 0.24 and 0.

42.

6. The full-color organic electroluminescent display device according to claim 1, characterized in that, The red light-emitting device emits visible light with a peak value of 600-700nm, the green light-emitting device emits visible light with a peak value of 500-550nm, the blue light-emitting device emits visible light with a peak value of 440-470nm, and the cyan light-emitting device emits visible light with a peak value of 470-500nm. Preferably, the CIE of green light-emitting devices Y The value is greater than 0.76; and / or, the cyan light-emitting device emits visible light with a peak value of 475-490 nm.

7. The full-color organic electroluminescent display device according to claim 1 or 6, characterized in that, The half-width of the spectrum of the red, green, blue, and cyan guest materials is less than 40 nm. Preferably, the spectral half-width of the cyan guest material is less than 30 nm, more preferably less than 20 nm.

8. The full-color organic electroluminescent display device according to claim 1, characterized in that, The red light host material comprises a first red light host and a second red light host, and an excitocomplex is formed between the first red light host and the second red light host; the green light host material comprises a first green light host and a second green light host, and an excitocomplex is formed between the first green light host and the second green light host; the cyan light host material comprises a first cyan light host and a second cyan light host, and an excitocomplex is formed between the first cyan light host and the second cyan light host.

9. The full-color organic electroluminescent display device according to claim 1, characterized in that, The red, green, blue, and cyan light-emitting devices are either single-layer or series-connected feature structures. The area and shape of the red, green, blue, and cyan light-emitting devices may be the same or different from each other; Preferably, the red, green, blue, and cyan light-emitting devices are not all the same in size and shape.

10. The full-color organic electroluminescent display device according to any one of claims 1-9, characterized in that, It also includes an independently controlled yellow light-emitting device, which comprises a yellow light-emitting layer, and the yellow light-emitting layer comprises a yellow light host material and a yellow light guest material.

11. The full-color organic electroluminescent display device according to claim 10, characterized in that, The yellow light-emitting device emits visible light with a peak value of 550-580nm, preferably with a peak value of 560-570nm; The yellow light-emitting device has a spectral half-width of less than 40 nm, preferably less than 30 nm. Preferably, the yellow light-emitting device emits light with CIEx coordinates of 0.45±0.1 and CIEy coordinates of 0.5±0.

1.

12. The full-color organic electroluminescent display device according to claim 10, characterized in that, The red, green, blue, cyan, and yellow light-emitting devices are either single-layer or series-connected feature structures. The area and shape of the red, green, blue, cyan, and yellow light-emitting devices may be the same or different from each other.

13. The full-color organic electroluminescent display device according to any one of claims 1-12, characterized in that: The sensitizing material is a phosphorescent sensitizer selected from Ir-type complexes or Pt-type complexes, or the sensitizing material is a thermally activated delayed fluorescence sensitizer; Preferably, the thermally activated delayed fluorescence sensitizer is a thermally activated delayed fluorescence material containing a donor and acceptor framework.

14. The full-color organic electroluminescent display device according to any one of claims 1-13, characterized in that: At least one of the red light guest material, green light guest material, blue light guest material, and cyan light guest material is a boron-containing fluorescent material; And / or, one of the red light guest material, green light guest material, blue light guest material, and cyan light guest material is an Ir-type phosphorescent material or a Pt-type phosphorescent material.

15. The full-color organic electroluminescent display device according to any one of claims 1-14, characterized in that: At least one of the red, green, blue, and cyan guest materials is selected from the boron-containing fluorescent material represented by general formula (1): In equation (1), M1, M2, and M3 independently represent C3 to C3, which are either substituted by one or more R molecules or are not substituted. 10 Cycloalkyl groups, C3-C6 substituted with one or more R groups or unsubstituted C3-C6 substituted with R groups. 10 Heterocyclic alkyl groups, C6-C6 substituted with one or more R groups or unsubstituted C6-C6 alkyl groups. 60 The aromatic group, C2-C, substituted with one or more R groups or unsubstituted C2-C groups. 60 One of the heteroaryl groups; Ar1, Ar2, and Ar3 are independently represented as a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, or a C1-C group substituted with one or more R atoms or not substituted. 10 Alkyl groups, C3-C3 groups substituted with one or more R groups or unsubstituted groups. 10 Cycloalkyl, C1-C1 substituted with one or more R groups or unsubstituted C1-C1 substituted with R groups 10 Silyl group, C2-C substituted with one or more R groups or unsubstituted C2-C substituted with R groups 10 Boronyl groups, C1-C6 groups substituted with one or more R groups or unsubstituted groups 10 Alkoxy group, C2-C substituted with one or more R groups, or unsubstituted C2-C substituted with R groups. 10 Alkenyl group, C6-C substituted with one or more R groups or unsubstituted C6-C substituted with R groups 30 Aromatic amino group, C6-C substituted with one or more R groups or unsubstituted C6-C6 groups 60 aryl group, C2-C substituted with one or more R groups or unsubstituted C2-C substituted group 60 Heteroaryl groups, C6-C6 groups substituted with one or more R groups or unsubstituted C6-C6 groups. 30 One of the aryl groups; R represents a deuterium atom, a halogen atom, a cyano group, or a C1-C1 group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups; a, b, and c are each independently 0 or 1; X1, X2, and X3 are independently represented as single bonds, double bonds, -O-, -S-, -N(R'1)-, -B(R'2)-, -C(R'3)(R'4)-, -Si(R'5)(R'6)-, or -C(R'7)=C(R'8)-; R'1, R'2, R'3, R'4, R'5, R'6, R'7, and R'8 are each independently represented as C1 to C2 groups that are substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups; The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups; The heteroatom in the heteroaryl group is selected from one or more of O, S, N, Si, and B.

16. The full-color organic electroluminescent display device according to claim 15, characterized in that, The boron-containing fluorescent material has the structure shown in general formula (1-1): In general formula (1-1), the meanings of M1, M2, M3, Ar1, Ar2, Ar3, and X3 are the same as those defined in general formula (1).

17. The full-color organic electroluminescent display device according to claim 15, characterized in that, The boron-containing fluorescent material has the structure shown in general formula (1-2): In general formula (1-2), the meanings of M1, M2, and M3 are the same as those defined in general formula (1); Ar4 and Ar5 are independently represented as C1-C1 cells, substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups; The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups.

18. The full-color organic electroluminescent display device according to claim 15, characterized in that, The boron-containing fluorescent material has the structure shown in general formula (1-3) or general formula (1-4): In general formulas (1-3) and (1-4), A1, A2, A3, A4, and A5 are independently represented as C6 to C6 substituted or unsubstituted by one or more R's. 60 The aromatic ring, C2-C substituted or unsubstituted by one or more R's. 60 One of the aromatic rings; Ar4 and Ar5 are independently represented as C1 to C5 groups substituted or unsubstituted by one or more R's. 10 Alkyl groups, C3-C3 groups substituted with or unsubstituted with one or more R' groups. 10 Cycloalkyl, C2-C2 substituted or unsubstituted by one or more R' groups 10 Alkenyl, C6-C substituted or unsubstituted with one or more R' groups 60 aryl, C2-C substituted or unsubstituted by one or more R' groups 60 One of the heteroaryl groups; R' represents a deuterium atom, a halogen atom, a cyano group, or a C1-C1 group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups; Y1, Y2, Y3, Y4, R1, R2, R3, R4, and R5 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and C1-C1 atoms substituted or unsubstituted with substituents, respectively. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups; R1 and R2 are either not connected or connected in a loop; R2 and R3 are either not connected or connected in a loop; R4 and R5 are either not connected or connected in a loop. Y1 and Y2 are either not connected or connected in a loop, and Y3 and Y4 are either not connected or connected in a loop. The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups; The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

19. The full-color organic electroluminescent display device according to claim 15, characterized in that, The boron-containing fluorescent material has the structure shown in general formula (1-5), general formula (1-6), general formula (1-7), or general formula (1-8): In general formulas (1-5), (1-6), (1-7), and (1-8), A1, A2, A3, and A4 are independently represented as C6 to C6 substituted or unsubstituted by one or more R's. 60 The aromatic ring, C2-C2 with or without one or more R-substituted or unsubstituted R-substituted rings. 60 One of the aromatic rings; The "R" represents a deuterium atom, a halogen atom, a cyano group, or a C1-C1 group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups; Ar6 and Ar7 are independently represented as C1 to C6 groups substituted or unsubstituted by one or more R's. 10 Alkyl groups, C3-C3 groups substituted or unsubstituted with one or more R's. 10 Cycloalkyl, C2-C2 substituted or unsubstituted by one or more R's. 10 Alkenyl, C6-C substituted or unsubstituted with one or more R's. 60 Aryl group, C2-C2 substituted or unsubstituted by one or more R's. 60 One of the heteroaryl groups; Y1, Y2, Y3, Y4, R1, R2, R3, R4, R5, and R6 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and C1-C1 atoms substituted or unsubstituted with substituents, respectively. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups; Ar6 and Ar7 are either not connected or connected in a loop; Y1 and Y2 are either not connected or connected in a loop; Y3 and Y4 are either not connected or connected in a loop. The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups; The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

20. The full-color organic electroluminescent display device according to claim 15, characterized in that, The boron-containing fluorescent material has any of the structures shown in general formulas (1-9) to (1-11): In general formulas (1-9) to (1-11), A1, A2, A3, A4, A5, and A6 are independently represented as C6 to C6 substituted or unsubstituted by one or more R''. 60 The aromatic ring, C2-C substituted or unsubstituted by one or more R''. 60 One of the aromatic rings; Ar6, Ar7, Ar8, Ar9, Ar 10 Ar 11 Each is independently represented as C1 to C1 substituted or unsubstituted by one or more R”'. 10 Alkyl groups, C3-C3 groups substituted or unsubstituted with one or more R''. 10 Cycloalkyl, C2-C2 substituted or unsubstituted by one or more R'' substituted groups 10 Alkenyl, C6-C substituted or unsubstituted by one or more R''. 60 Aryl group, C2-C substituted or unsubstituted by one or more R'' groups 60 One of the heteroaryl groups; The R”' represents a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C1 group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups; Ar6 and Ar7 are either not connected or connected in a loop; Ar8 and Ar9 are either not connected or connected in a loop. In equation (1-10), X represents a single bond, a double bond, -O-, -S-, -N(R”1)-, -B(R”2)-, -C(R”3)(R”4)-, -Si(R”5)(R”6)- or -C(R’7)=C(R’8)-; R”1, R”2, R”3, R”4, R”5, R”6, R”7, and R”8 are each independently represented as C1 to C2 cells substituted or unsubstituted by substituents. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups; The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups; The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

21. The full-color organic electroluminescent display device according to claim 15, characterized in that, The boron-containing fluorescent material has any of the structures shown in general formulas (1-12) to (1-15): In general formulas (1-12) to (1-15), R1, R2, R3, R4, R5, R6, R7, R8, R9, R 10 R 11 R 12 Each of the following can be represented independently as a hydrogen atom, deuterium atom, halogen atom, cyano group, or C1-C1 atoms substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C2-C, substituted or unsubstituted 10 Alkyne group, C1-C6 groups substituted or unsubstituted 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 10 Aryloxy group, C6-C6 substituted or unsubstituted groups 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 30 Aryl, substituted or unsubstituted C2-C 30 heteroaryl, C2-C substituted or unsubstituted 10 One of the boroalkyl groups; Ar1 represents a hydrogen atom, deuterium atom, halogen atom, cyano group, or C1-C1 atoms that are substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C2-C, substituted or unsubstituted 10 Alkyne group, C1-C6 groups substituted or unsubstituted 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 10 Aryloxy group, C6-C6 substituted or unsubstituted groups 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 30 Aryl, substituted or unsubstituted C2-C 30 One of heteroaryl groups, or one of C2-C10 borane groups that are substituted or unsubstituted; a1, a2, a3, a4, a5, a6, and a7 can be independently represented as 0, 1, 2, 3, or 4; X represents a single bond, double bond, -O-, -S-, or -N(R). a - or -C(R) b (R) c )-, the R a R b R c Individually represented as C1 to C2 cells substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aryl, substituted or unsubstituted C2-C 30 One of the heteroaryl groups; The substituents are selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C3-C 10 cycloalkyl, deuterated C3-C 10 cycloalkyl, C6-C 30 Aryl and deuterium-substituted C6-C 30 Aryl, C2~C 30 heteroaryl and deuterium-substituted C2-C 30 Any one or more of the heteroaryl groups; The heteroatom in the heteroaryl group is selected from one or more of O, S, N, Si, and B.

22. The full-color organic electroluminescent display device according to claim 15, characterized in that, The boron-containing fluorescent material has the structure shown in general formula (1-16): In general formula (1-16), R1 and R2 independently represent hydrogen atom, deuterium atom, halogen atom, cyano group, and C1 to C2 atoms substituted or unsubstituted with substituents, respectively. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C2-C, substituted or unsubstituted 10 Alkyne group, C1-C6 groups substituted or unsubstituted 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 10 Aryloxy group, C6-C6 substituted or unsubstituted groups 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 30 Aryl, substituted or unsubstituted C2-C 30 heteroaryl, C2-C substituted or unsubstituted 10 One of the boroalkyl groups; Each occurrence of Z is independently represented as N, C-(H), or C-(Ra); Ra represents a deuterium atom, a halogen atom, a cyano group, or a C1-C group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C2-C, substituted or unsubstituted 10 Alkyne group, C1-C6 groups substituted or unsubstituted 10 Alkoxy groups, substituted or unsubstituted C5-C6 groups 10 Aryloxy group, C6-C6 substituted or unsubstituted groups 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 30 Aryl, substituted or unsubstituted C2-C 30 heteroaryl, C2-C substituted or unsubstituted 10 Boronyl groups, substituted or unsubstituted C2-C3 groups 10 One of the silane groups; X1 and X2 independently represent N-R0, S, or O, respectively; The R0 is independently represented as a C1-C1 bond that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C 12 -C 10 Alkenyl, C2-C, substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C6-C 30 Aryl, substituted or unsubstituted C2-C 30 One of the heteroaryl groups; The above substituents can be selected from deuterium, halogen atoms, cyano groups, C1 to C2. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C3-C 10 cycloalkyl, deuterated C3-C 10 cycloalkyl, C6-C 30 Aryl and deuterium-substituted C6-C 30 Aryl, C2~C 30 heteroaryl and deuterium-substituted C2-C 30 Any one or more of the heteroaryl groups; The heteroatom in the heteroaryl group is selected from one or more of O, S, N, Si, and B.

23. The full-color organic electroluminescent display device according to claim 15, characterized in that, The boron-containing fluorescent material has any of the following structures:

24. The full-color organic electroluminescent display device according to any one of claims 1-14, characterized in that, One or more of the red light guest material, green light guest material, blue light guest material, cyan light guest material, and yellow light guest material have the structure shown in any one of general formulas (2-1) to (2-5): In general formulas (2-1) to (2-5), M4, M5, M6, and M7 are independently represented as C6 to C6 cells substituted or unsubstituted by one or more R's. 60 The aryl group, substituted with one or more R's or not substituted, C2-C 60 One of the heteroaryl groups; The R”” represents a deuterium atom, a halogen atom, a cyano group, or a C1-C1 group that is substituted or unsubstituted. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C30 aromatic amino groups substituted or unsubstituted, C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups; R1, R2, R3, and R4 are independently represented as a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, or C1-C1 atoms substituted or unsubstituted with substituents. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups; n1 and n2 are independently represented as 0, 1, 2 or 3 respectively; m1, m2, m3, and m4 are independently represented as 0, 1, 2, 3 or 4 respectively. The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups; The heteroatom in the heteroaryl group is selected from one or more of O, S, N, Si, and B.

25. The full-color organic electroluminescent display device according to claim 24, characterized in that, One or more of the red light guest material, green light guest material, blue light guest material, cyan light guest material, and yellow light guest material have any of the structures shown in general formulas (2-6) to (2-11): In general formulas (2-6) to (2-11), R1, R2, R3, R4, R5, R6, R7, and R8 represent hydrogen atoms, deuterium atoms, halogen atoms, cyano groups, and C1 to C1 atoms substituted or unsubstituted with substituents. 10 Alkyl groups, substituted or unsubstituted C3-C6 groups 10 Cycloalkyl, C2-C6 substituted or unsubstituted 10 Alkenyl, C6-C6 with or without substituents 30 Aromatic amino group, C6-C6 groups substituted or unsubstituted 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, C2-C substituted or unsubstituted 10 Silyl groups, substituted or unsubstituted C2-C3 groups 10 Boronyl groups, substituted or unsubstituted C1-C2 groups 10 Alkoxy groups, substituted or unsubstituted C6-C6 groups 30 One of the aryl groups; m1, m2, m3, m4, m5, m6, m7, and m8 are each independently represented as 0 to the maximum allowed number of substitutions; The substituents mentioned above can be selected from deuterium, halogen atoms, cyano groups, C1 to C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups; The heteroatom in the heteroaryl group is selected from one or more of O, S, N, Si, and B.

26. The full-color organic electroluminescent display device according to claim 24, characterized in that, One or more of the red light guest material, green light guest material, blue light guest material, cyan light guest material, and yellow light guest material have the following structures:

27. The full-color organic electroluminescent display device according to any one of claims 1-14, characterized in that, One or more of the red light guest material, green light guest material, blue light guest material, and cyan light guest material have the structure shown in general formula (3): In general formula (3), M1 represents C3 to C1 that are substituted or not substituted by one or more R's. 10 Cycloalkyl groups, C3-C3 substituted with one or more R'', or unsubstituted. 10 Heterocyclic alkyl groups, C6-C6 substituted with one or more R'' or unsubstituted. 60 The aromatic group, C2-C, is substituted with one or more R's or is unsubstituted. 60 One of the heteroaryl groups; The R””’ represents a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C1 group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups; Ar1, Ar2, Ar3, and Ar4 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and substituted or unsubstituted C1-C1 atoms, respectively. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups; Ar1 and Ar2 are either not connected or are connected in a loop; Ar3 and Ar4 are either not connected or are connected in a loop. R1, R2, R3, R4, R5, and R6 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, and substituted or unsubstituted C1-C1 atoms, respectively. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups; The substituents used for the substituent groups are optionally selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups; The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

28. The full-color organic electroluminescent display device according to claim 27, characterized in that, One or more of the red light guest material, green light guest material, blue light guest material, and cyan light guest material have the following structure:

29. The full-color organic electroluminescent display device according to claim 2, characterized in that, The phosphorus photosensitizer has a structure shown in any one of general formulas (4-1) to (4-4): In general formulas (4-1) to (4-4), Y, Z, J, and K are independently represented as N or C-R0; The R0 is independently represented by a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C1 group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups; The rings A, A1, A2, A3, and A4 are each independently represented as C6 to C6 cells substituted or unsubstituted by one or more R's. 60 The aromatic ring, C2-C2 with one or more R-substituted or unsubstituted rings. 60 One of the aromatic rings; X'1 and X'2 are independently represented as C6 to C6 molecules substituted or unsubstituted by one or more R's. 60 The aromatic ring, C2-C2 with one or more R-substituted or unsubstituted rings. 60 One of the aromatic rings; The R””” represents a deuterium atom, a halogen atom, a cyano group, or a substituted or unsubstituted C1-C group. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups; R1, R2, R3, and R4 are independently represented as hydrogen atom, deuterium atom, halogen atom, cyano group, substituted or unsubstituted C1 to C1 atoms, respectively. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups; n is represented as 1 or 2; k2, k3, g1, g2, g3, and g4 are independently represented as 0, 1, 2, or 3, respectively; T1 to T4 are each independently a chemical bond, oxygen, or sulfur; L1 to L4 are independently single-bonded, oxygen-containing, sulfur-containing, substituted, or unsubstituted C6-C bonds, respectively. 60 Aromatic groups, substituted or unsubstituted C2-C 60 One of the heteroaryl groups; Y'1, Y'2, Y'3, and Y'4 are each independently N or C; The substituents used for the substituent groups are optionally selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups; The heteroaryl group and the heteroatom in the heteroaryl ring are selected from one or more of O, S, N, Si, and B.

30. The full-color organic electroluminescent display device according to claim 29, characterized in that, The phosphorus photosensitizer has a structure shown in any one of general formulas (4-5) to (4-10): In general formulas (4-5) to (4-10), Z is represented by N or CR each time it appears, either the same or different. Z ; The R Z Each occurrence is independently represented as a hydrogen atom, deuterium atom, halogen atom, cyano group, or substituted or unsubstituted C1-C. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C2-C 10 Alkyne group, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 aryloxy group, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups; Y represents O, S, N(R) a ), C(R b (R) c ); m represents 1 or 2, n represents 1 or 2, and m+n equals 3; Y1, Y2, Y3, and Y4 represent single bonds, O, S, and N(R). a ), C(R b (R) c ); i, j, p, q represent 0 or 1; R a R b R c Each occurrence is independently represented as either substituted or unsubstituted C1 to C2. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C2-C 10 Alkyne group, substituted or unsubstituted C6-C 30 Aryl, substituted or unsubstituted C2-C 30 Any one of the heteroaryl groups; The substituents used for the substituent groups are optionally selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups.

31. The full-color organic electroluminescent display device according to claim 29, characterized in that, The phosphorus photosensitive material is selected from the following structures:

32. The full-color organic electroluminescent display device according to claim 2, characterized in that, The thermally activated delayed fluorescence sensitizer has a structure shown in any of the following general formulas (5-1) to (5-13): In general formulas (5-1) to (5-13), R1, R2, R3, R4, R5, R6, R7, R8, R9, R 10 Each can be independently represented as a hydrogen atom, deuterium atom, halogen atom, cyano group, or substituted or unsubstituted C1-C1 atoms. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 30 Aromatic amino group, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 heteroaryl, substituted or unsubstituted C2-C 10 Silyl, substituted or unsubstituted C2-C 10 Boronyl, substituted or unsubstituted C1-C 10 Alkoxy, substituted or unsubstituted C6-C 30 One of the aryl groups; Ar'1, Ar'2, and Ar'3 are independently represented as substituted or unsubstituted C1 to C2 groups, respectively. 10 Alkyl, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C2-C 10 Alkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C2-C 60 One of the heteroaryl groups; The substituents used for the substituent groups are optionally selected from deuterium, halogen atoms, cyano groups, C1-C2 groups. 10 Alkyl, deuterium-substituted C1-C 10 Alkyl, C6-C 60 Aryl and deuterium-substituted C6-C 60 Aryl, C2~C 60 heteroaryl and deuterium-substituted C2-C 60 Any one or more of the heteroaryl groups.

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