417 results about "Exciton" patented technology

A continuous-wave perovskite polariton laser device, including an optical microcavity, a spacer layer, and a gain medium. The gain medium is a perovskite material or a composite material containing perovskite, in a form of thin film, microcrystal, phosphor, nanocrystal, quantum dot, or single crystal. The perovskite gain medium is prepared by solution process or vacuum deposition technique, and is combined with an optical resonator. By exploiting the strong interaction between excitons and photons, a steady-state exciton-polariton condensation is formed, enabling the generation of continuous-wave polariton laser emission with a low threshold. The laser device can achieve low-threshold continuous-wave or pulsed lasing emission at room temperature under various light sources pumping or electrical excitation. Its threshold is 1 to 3 orders of magnitude lower than that of conventional semiconductor lasers, with an optimized threshold as low as 0.1 to 1 W / cm2, representing a novel ultralow-power coherent light source technology.

The invention relates to the technical field of semiconductors, in particular to a photoluminescence detection method for dislocation density in silicon, which comprises the following steps: preparing a plurality of silicon samples with known dislocation density, and acquiring photoluminescence spectrums of the silicon samples under standardized photoluminescence test parameters; a dislocation eigenpeak in a photoluminescence spectrum is identified; calculating the ratio of the intensity of the dislocation eigenpeak to the intensity of the silicon eigenfree exciton peak, and carrying out weighted summation on each ratio to obtain a comprehensive signal value; establishing a function relationship between the dislocation density and the comprehensive signal value; obtaining a photoluminescence spectrum of the silicon sample under the standard photoluminescence test parameters; identifying a dislocation eigenpeak and a free exciton peak of the silicon sample, and calculating an actual ratio of the two intensities; calculating an actual comprehensive signal value according to the actual ratio, and calling the function relation to obtain dislocation density; based on the PL technology, high-precision, lossless and rapid quantitative detection of the dislocation density in silicon can be realized, and the method has important industrial application value.

The invention provides a carbazole ring-containing compound and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescent materials. The carbazole ring-containing compound provided by the invention has relatively high glass transition temperature and molecular thermal stability, and has a proper HOMO energy level, so that the distribution of electrons and holes in a luminescent layer is more balanced, and the recombination efficiency of excitons in the luminescent layer is improved; when the compound is applied to a light-emitting layer of an organic light-emitting device, the light-emitting efficiency and the service life of the device can be effectively improved. Meanwhile, the preparation method of the compound is simple, raw materials are easy to obtain, and the compound can be widely applied to the fields of organic thin film transistors, panel display and the like and has good application effects and industrialization prospects.

The invention relates to modified nitrogen-rich carbon nitride as well as a preparation method and photocatalytic application thereof. The preparation method comprises the following steps: mixing nitrogen-rich carbon nitride and fused salt, and performing secondary calcination to obtain an intermediate; the secondary calcining temperature is 550 DEG C to 600 DEG C; the fused salt comprises a potassium source; and washing and drying the intermediate to obtain the modified nitrogen-rich carbon nitride. According to the invention, potassium ion doping modification is carried out in nitrogen-rich carbon nitride, so that the nitrogen-rich carbon nitride has stronger photon-generated carrier separation and transmission capability because the internal transmission resistance is reduced due to high crystallinity of KC3N5 and K < + > is successfully introduced to serve as a transmission channel for interlayer electron transfer, after introduction of K < + >, Eb of C3N5 is significantly reduced, exciton dissociation and generation of photon-generated carriers are facilitated, and the performance of the material is improved. The effect of producing H2O2 through photocatalysis of the KC3N5 is enhanced; when the photocatalyst is applied to photocatalytic production of H2O2, the production rate of H2O2 can reach up to 117 times of that of C3N5, and the photocatalyst has excellent photocatalytic stability, can efficiently produce H2O2 in a wide pH range, and is suitable for various complex water substrates to remarkably improve the production rate of H2O2.

The invention is applicable to the technical field of photoelectricity, and provides a single-matrix white-light rare earth lead-free perovskite nanocrystal, a preparation method and application, and the single-matrix white-light rare earth lead-free perovskite nanocrystal is Eu < 3 + > ion doped Cs3TbCl6 nanocrystal. The rare earth ion Eu < 3 + > is doped into the Cs3TbCl6 nanocrystal, full-spectrum white light emission of blue light (matrix self-limiting state exciton emission), green light (Tb < 3 + > ion emission) and red light (Eu < 3 + > ion emission) is obtained, excellent thermal stability and environmental stability are achieved, and the nanocrystal material also shows excitation light dependent color adjustable emission (blue light, green light, red light and white light) and has good application prospects. The nanocrystal prepared based on a solution method can be applied to large-area flexible photoelectric devices; the fluorescent conversion layer can be used as a fluorescent conversion layer of a white light emitting diode with a high color rendering index, and can also be applied to anti-counterfeiting and information encryption.

The invention discloses a boron-nitrogen compound and an organic electroluminescent device using the same, and relates to the technical field of organic electroluminescence. According to the boron-nitrogen compound provided by the invention, spiro and electron donor groups are introduced, so that the reverse intersystem crossing rate of molecules is favorably improved, triplet state exciton quenching is overcome, intermolecular close packing is effectively inhibited, the problem of spectrum broadening under high doping concentration is relieved, and the color purity of a device is improved; the compound is applied to a luminescent layer doping material of an organic electroluminescent device, so that the stability of the device is improved, and the service life of the device is prolonged.

The invention belongs to the technical field of organic electronics, and provides a compound, a mixture and a composition for further improving the performance of an organic EL device, and the organic EL device with further improved device performance. The compound has a structure as shown in a formula (1), has an asymmetric structure, can inhibit molecular aggregation and reduce exciton quenching, and shows a high triplet state energy level. The driving voltage of the prepared organic electronic device is reduced, and the luminous efficiency is obviously improved. In addition, the compound provided by the invention also has relatively high thermal stability and contains a certain content of deuterium atoms, so that the service life of the organic electronic device is prolonged. The organic electronic device can be applied to the fields of display and illumination.

Provided in the present disclosure are a light-emitting device and a display panel comprising same, and a display apparatus. The light-emitting device comprises: a first carrier layer, a light-emitting layer and a second carrier layer, which are arranged in a stacked manner, wherein the light-emitting layer comprises a first light-emitting layer, a second light-emitting layer and a third light-emitting layer, which are arranged in a stacked manner, with the first light-emitting layer being arranged close to the first carrier layer, and the first light-emitting layer and the third light-emitting layer have different carrier transport rates. The light-emitting device of the present disclosure has a structure of three light-emitting layers, wherein the first light-emitting layer which is close to an anode side has a good hole injection / transport capability, the third light-emitting layer which is close to a cathode side has a good electron injection / transport capability, and the second light-emitting layer in the middle has a good hole and electron transport capability. Electrons and holes can be better injected into the light-emitting layers, an exciton recombination zone can also be broadened, and a larger part of the recombination zone is made to be within the light-emitting layers, so as to reduce the energy loss of non-radiative transition, thereby improving the efficiency and stability of devices.

The application provides a cyclic imide derivative with a high-efficiency multi-exciton effect and a synthesis method and application thereof, and belongs to the technical field of organic optoelectronic materials. The cyclic imide derivative has any one of the following structural formulae: wherein n is 1 or 2 or 3; m is an integer in 1-15; Ar represents an aryl group; and R is selected from a substituted or unsubstituted C1-C15 alkyl chain or a phenyl chain. The application directly synthesizes a novel cyclic compound through a synthesis method, and a series of different cyclic imide compounds can be further synthesized by changing the number of aryl groups on the ring and the type of imide compounds. Experimental tests prove that the cyclic imide compound can be applied in the field of singlet fission materials, and excellent bipolar transport performance is exhibited when the cyclic imide compound is applied in an organic field effect transistor device, so the cyclic imide compound has a good industrial application prospect.

The invention discloses a TADF luminescent material and a preparation method thereof, and relates to the technical field of organic optoelectronics, the molecular structure of the material comprises a phenyl triazine derivative electron-deficient core as an electron acceptor and a carbazole or tert-butyl carbazole electron-rich group as an electron donor; an aggregation-induced emission mechanism is introduced into the thermally activated delayed fluorescence material, so that the aggregation-induced quenching problem of a traditional thermally activated delayed fluorescence material and the exciton annihilation effect under high brightness are effectively solved, and meanwhile, the defect that a traditional aggregation-induced emission molecule is low in electroluminescence efficiency is overcome; the material can be used for preparing a non-doped organic electroluminescent device, the process is simplified, the cost is reduced, and the material has application potential in the field of intelligent response materials.

The invention relates to the technical field of luminescent materials, in particular to a circularly polarized phosphorescent Pt (II) complex as well as a preparation method and application thereof. The circularly polarized phosphorescent Pt (II) complex has a structure as shown in a formula (R)-I, a formula (S)-I, a formula (R)-II, a formula (S)-II, a formula (R)-III or a formula (S)-III, according to the invention, [2.2] paracyclophane is mainly used as a planar chiral skeleton, and different sites of the planar chiral skeleton are modified to obtain the circularly polarized phosphorescent Pt (II) complex which is stable in chirality and is not easy to racemize. The high-efficiency circularly polarized phosphorescent Pt (II) complex with both luminous quantum yield and circular polarization property is obtained by utilizing the advantages of a four-coordinate plane structure, high exciton utilization rate and adjustable color of the Pt (II) complex, and the high-efficiency circularly polarized phosphorescent Pt (II) complex has great research value on development of circularly polarized chiral materials. .

An optical gate device may have one or more optical cavities. The optical cavity may have an embedded optically-active material providing strong light-matter coupling. A pump input allows application to of a pulsed optical pump beam the optically-active material. The pump beam is absorbed by the optically active material to form an exciton-polariton condensate which emits light. The optical gate device may have an input waveguide to input a seed signal to the optical cavity. The optical gate device may include an output waveguide to output of an optical signal at a wavelength corresponding to a resonant mode of a the cavity. The device may operate in a manner such that, when the pump beam is applied to the pump input, an optical output signal is selectively provided in the output waveguide, via the input of the a seed signal and light emitted by the exciton-polariton condensate.

The present application relates to the field of organic electroluminescent material technology, and in particular, to an organic compound, an organic electroluminescent device comprising same, and an electronic apparatus. The compound of the present application comprises a polycyclic conjugated core structure. When used as the host material of a light-emitting layer, the compound of the present application can improve the carrier balance in the light-emitting layer, widen the carrier recombination region, improve the exciton generation and utilization efficiency, and increase the light-emitting efficiency and service life of the device.

The invention provides synthesis of small organic molecule TPAY based on a triphenylamine group and application of the small organic molecule TPAY in photocatalytic hydrogen evolution, and belongs to the technical field of photocatalytic materials. The small organic molecule based on the triphenylamine groups has the characteristics of a push-pull electron structure, and two triphenylamine groups are introduced into the molecular structure. The introduction of a triphenylamine group further expands a molecular conjugate plane, and is beneficial to improving intramolecular diffusion and dissociation of photo-generated excitons. The small organic molecule TPAY based on the triphenylamine group is successfully applied to a photocatalytic hydrogen evolution experiment, good hydrogen evolution efficiency is achieved, and the performance of the small organic molecule TPAY is superior to that of a corresponding small organic molecule Y6 without the triphenylamine group.

The application discloses a display panel, a manufacturing method thereof and an evaporation device, and belongs to the technical field of display. The display panel comprises a plurality of light-emitting parts, and each light-emitting part comprises a plurality of stacked unit material layers. The density of at least one of the blue light-emitting part and the green light-emitting part is greater than the density of the red light-emitting part, and the density is the ratio of the number of unit material layers in the light-emitting part to the thickness of the light-emitting part. Since the more the number of unit material layers in the light-emitting part is, the more uniform the doping degree of the at least two light-emitting materials in the light-emitting part is, and the higher the probability of the recombination of holes and electrons in the light-emitting part to form excitons is, the longer the light-emitting life of the light-emitting part is without changing the overall thickness of the light-emitting part, therefore, the light-emitting life of at least one of the blue light-emitting part and the green light-emitting part can be improved by increasing the density of at least one of the blue light-emitting part and the green light-emitting part, so that the light-emitting life of the blue light-emitting part, the green light-emitting part and the red light-emitting part is relatively close.

A quantum simulation method for solving a computational problem using a solid-state quantum system, the method comprising the steps of: passing a laser through a material; in the material, evolving at least some of a plurality of atoms in a first state into at least some of a plurality of atoms in a second state upon receiving energy from the laser to form at least one exciton; selecting at least one exciton site on the material wherein the at least one exciton site is separated from a neighbouring at least one exciton site by a distance less than a Rydberg blockade radius; mapping the computational problem into a problem Hamiltonian of the solid-state quantum system; measuring at least a portion of plurality of the at least one excitons to obtain a read-out of the solid-state quantum system; and determining a solution to the computational problem from the read-out.

The invention discloses an organic electroluminescent device and a display assembly thereof. The organic electroluminescent device includes a first organic layer, a light-emitting layer, and a second organic layer disposed therebetween, since a second organic material having a specific high triplet level is used in the second organic layer, and a combination of the first organic material and the second organic material having a specific small level difference is used in the first organic layer, the organic light-emitting device has improved light-emitting efficiency. According to the novel organic light-emitting device with the simplified structure, the light-emitting characteristic of excitons in the light-emitting layer can be effectively regulated and controlled, the efficiency can be greatly improved or the service life can be greatly prolonged while low voltage is kept, and more excellent comprehensive device performance can be obtained. A display assembly is also disclosed.

The invention relates to the technical field of organic electroluminescence, in particular to a fused heterocyclic compound and an organic electroluminescence device containing the compound. The compound has a characteristic double-boron-nitrogen aromatic fused structure, and rigid substituents such as phenanthrene amine, naphthylamine, anthramine and fluoranthene amine are introduced to the periphery of the compound, so that a molecule has a relatively high T2 energy level, the T1 energy level is remarkably reduced, T2 is slightly higher than S1 energy level, T2-T1 internal conversion is inhibited, T2-S1 exciton up-conversion is promoted, the exciton utilization rate is increased, and the luminous efficiency is remarkably improved. An OLED device prepared from the compound has the advantages of low starting voltage, high color purity, high efficiency and excellent service life, meets the requirements of a high-performance display panel on a luminescent material, and has a good application prospect.

The present application relates to the technical field of organic photoelectric material, in particular to a kind of arylamine compound and organic electroluminescent device thereof.The arylamine compound provided by the present application has good spatial configuration, excellent arrangement between molecules, excellent hole transport capacity, good film stability, proper HOMO and T1 value, good matching with adjacent organic functional layer, high glass transition temperature, excellent thermal stability and chemical stability, as light-emitting auxiliary layer, can transport hole well, also can block exciton from light-emitting layer to hole transport region, avoid interface luminescence, effectively improve the luminous efficiency of OLED device, prolong the service life of device;It also has higher refractive index, can be applied to OLED device as cover layer material, enhance the light transmittance of device, while resistant to high temperature, can also effectively isolate water vapor, oxygen and corrosive gas, thereby delaying the aging of device, further improve the luminous efficiency and service life of device.

The invention discloses a display panel, an organic light-emitting device and a manufacturing method of the organic light-emitting device. The organic light-emitting device comprises at least one light-emitting subunit, and different light-emitting subunits are configured to emit light of different colors. The light-emitting subunit comprises at least one light-emitting layer, and the light-emitting layer comprises a host material, a guest material and a molecular sieve. At least part of the guest material and / or host material is distributed in the pore channels of the molecular sieve. The molecular sieve is added into the light-emitting layer. The molecular sieve has a high specific surface area and a large number of active sites, so that a large-area doping material setting space can be provided, the molecular aggregation of the doping material is reduced, the aggregation state of the doping material of a luminescent layer is reduced, and the characteristic of quenching of a device caused by too high exciton concentration is reduced. The high water absorption of the molecular sieve can further hinder the influence of water molecules on the luminescent material, thereby prolonging the service life of the luminescent device.

The application discloses a host material, an organic electroluminescent material containing double hosts and application thereof, and relates to the field of organic electroluminescent materials. The structure of the host material is shown in general formula 1: the first host material with a triazine skeleton is connected with two benzene mother nuclei at different positions of a naphthalene ring, and the rigid planar structure brings high glass transition temperature and thermal decomposition temperature. One benzene is fixed at an ortho position of the triazine ring, and a dibenzofuran is used as a main host group at another position of the triazine ring, which can efficiently transport electrons, balance electrons and holes, realize a wider exciton recombination region and higher exciton utilization, and effectively reduce the driving voltage and efficiency roll-off. Meanwhile, the second host with a triarylamine structure is matched, which can simultaneously enhance the hole transport and electron transport capacity, so that when the holes are injected into the p-type host and the electrons are injected into the n-type host, the driving voltage is reduced, and the luminous efficiency and the service life are also significantly enhanced.

This invention relates to the field of optical technology, specifically to a multi-mode FP-anapole-exciton system that achieves multiple strongly coupled Rabi splits. The system comprises basic units arranged in a two-dimensional periodic pattern, with a square period. Each basic unit includes, from bottom to top, a first dielectric layer, a first metal layer, a composite layer, a second metal layer, and a second dielectric layer. The composite layer includes a transparent dielectric and a heterogeneous disk embedded within it. The heterogeneous disk includes, from top to bottom, a first dielectric disk, a semiconductor disk, and a second dielectric disk. This invention utilizes incident light waves to induce excitation of multiple FP-cavity modes, anapoles, and excitons. Through precise structural design and parameter adjustment, it achieves strong coupling between these multiple FP-cavity modes, anapoles, and excitons, expanding the number of Rabi splits, enhancing the strength of the three-mode coupling, and obtaining multiple large Rabi splitting energies. It has broad application prospects in ultrafast optical switches, Bose-Einstein condensates, and low-threshold lasers.

The invention provides a host compound, a dual-host material and an organic electroluminescent device, and belongs to the technical field of organic photoelectric materials, the host compound has a structure as shown in formula I. The dual-host material comprises a first host compound and a second host compound, the first host compound is a host compound with a structure as shown in a formula I; and the second host compound has a structure as shown in a formula II. The first host compound with the specific structure has higher hole mobility, the second host compound has higher electron mobility, and the first host compound and the second host compound with the specific structures are compounded, so that the hole mobility and the electron mobility can be balanced; by adding excitons in the light-emitting layer, the double-main-body material not only can improve the light-emitting efficiency and prolong the service life of a device, but also can reduce the driving voltage.

The present invention relates to the use of transition metal-carbene complexes in organic light-emitting diodes (OLEDs), to a light-emitting layer, to a blocking layer for electrons or excitons, or to a blocking layer for holes, each comprising these transition metal-carbene complexes, to OLEDs comprising these transition metal-carbene complexes, to devices which comprise an inventive OLED, and to transition metal-carbene complexes.

The invention relates to the technical field of organic electroluminescent materials, and provides an organic compound, an organic electroluminescent device containing the same and an electronic device. The arylamine compound comprises a dibenzofuran carbazole mother nucleus structure, and when the compound is used as a hole-type main body material in a mixed main body material, the carrier balance in a light-emitting layer can be improved, the carrier recombination area can be widened, the exciton generation and utilization efficiency can be improved, the light-emitting efficiency of a device can be improved, and the service life of the device can be prolonged.

The application relates to the technical field of organic light-emitting display, and discloses a cyano-substituted aryl ring-connected triazine compound and application thereof. The cyano-substituted aryl ring-connected triazine compound has a structure as shown in formula (I), the compound provided by the application has high bond energy between atoms, good thermal stability, is conducive to solid-state stacking between molecules, is conducive to injection and migration of excitons, can effectively reduce the driving voltage of an organic electroluminescent device when used as an electron transport material, improves the light-emitting efficiency of the organic electroluminescent device, and prolongs the service life of the organic electroluminescent device. Meanwhile, the cyano substitution can adjust the energy level of the compound, the HOMO and LUMO energy levels are deepened, the compound is more matched with adjacent layers, and the device voltage is reduced. The application further provides an organic electroluminescent device and a display device containing the compound of formula (I).

The invention belongs to the technical field of organic electronics, and provides a compound, a mixture and a composition for further improving the performance of an organic EL device, and the organic EL device with further improved device performance. The compound has a structure as shown in a formula (2) or a formula (3), and the compound has an asymmetric structure, so that molecular aggregation can be inhibited, and exciton quenching can be reduced. The driving voltage of the prepared organic electronic device is reduced, and the luminous efficiency is obviously improved. The compound provided by the invention also has relatively high thermal stability and contains a certain content of deuterated benzene rings, so that the service life of the organic electronic device is prolonged. The organic electronic device can be applied to the fields of display and illumination.

A light emitting device includes a first electrode, a hole transporting layer in contact with the first electrode, a second electrode, an electron transporting layer in contact with the second electrode; and an emissive layer between the hole transporting layer and the electron transporting layer. The emissive layer includes a phosphorescent emitter, a fluorescent emitter, and a host, and the phosphorescent emitter harvests electrogenerated excitons and transfers energy to the fluorescent emitter.

The invention belongs to the technical field of organic photoelectric materials, and provides a boron-nitrogen-containing multi-element heterocyclic ring material and an organic electroluminescent device comprising the same. The boron and nitrogen-containing multi-element heterocyclic ring material provided by the invention is a brand-new sensitized material and doped material with a boron and nitrogen six-element heterocyclic ring at the center of a molecular skeleton and a multi-benzene ring structure. The structure has good stability, and can inhibit molecular vibration relaxation and reduce non-radiative transition, thereby achieving a good service life. Meanwhile, the material has good high exciton utilization rate and small delta EST, intersystem crossing can be achieved more easily, and better photoelectric conversion efficiency is achieved.

This invention discloses a method for preparing and applying a gold cluster scintillator protected by a stable luminescent free radical ligand. The scintillator material uses (3,5-dichloro-4-pyridine)bis(2,4,6-trichlorobenzene)methyl free radical (PyBTM) as a ligand, and a chain-like tetranuclear free radical cluster is constructed using a one-pot method. The chemical formula of the compound is [Au4(PNP)2(PyBTM)2](SbF6)4, belonging to the triclinic crystal system, space group R-3. This free radical cluster scintillator achieves 100% theoretical exciton utilization and a short radiation decay lifetime due to its unique doublet emission mechanism. These properties make it an ideal candidate material for overcoming the contradiction between high luminous yield and fast response in traditional scintillators. Due to the excellent thermal and water-oxygen stability of this system, it can be fabricated into a scintillator screen to further achieve high-quality X-ray imaging with a spatial resolution of up to 31 LP·mm. ‑1 This provides a general design strategy for high-performance radiation detection materials.