25 results about "Radiative transition" patented technology

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.

The invention belongs to the technical field of organic electroluminescent materials, and particularly relates to a boron-nitrogen compound with a naphtho-carbazole structure and an organic electroluminescent device.According to the boron-nitrogen compound with the naphtho-carbazole structure, on the basis of multiple resonance nuclei of boron and nitrogen, novel conjugate extension is constructed, and the structure of the boron-nitrogen compound with the naphtho-carbazole structure is improved; the whole conjugation degree of the structure is increased, so that the structure has a relatively strong rigid conjugation skeleton, the non-radiative transition of excited state energy can be reduced, the relaxation of the excited state structure is inhibited, and the fluorescence quantum efficiency is improved; more importantly, due to the introduced naphtho-carbazole unit, the organic electroluminescent material has better electron and hole double injection capability, so that a host material and a sensitizer material can be better matched, and an OLED device prepared from the organic electroluminescent material has lower driving voltage, higher current efficiency and longer service life.

The invention discloses an acid-base response type organic room-temperature phosphorescent material based on a B-N bond and a preparation method and application thereof. The acid-base response type organic room-temperature phosphorescent material comprises a host matrix and guest molecules doped in the host matrix, the main matrix is poly (4-vinylpyridine); the guest molecule is an aromatic compound with a boric acid ester group; a dynamic B-N coordination bond is formed between boron atoms in the guest molecule and nitrogen atoms of a pyridine group in the host matrix, and the reversible phosphorescence response to an acidic atmosphere and / or an alkaline atmosphere is realized by the acid-base response type organic room temperature phosphorescence material based on the B-N bond through the formation and fracture of the dynamic B-N coordination bond. The B-N bond can also anchor molecules to inhibit non-radiative transition, promote spin-orbit coupling and induce efficient room-temperature phosphorescence. According to the invention, blue-to-red full-color gamut luminescence is realized by adjusting the structure and the concentration of the object, and the blue-to-red full-color gamut luminescent material has super-long service life and high-sensitivity reversible switching The preparation process is simple and environment-friendly, and has wide application prospects in the fields of information encryption, anti-counterfeiting and detection.

The present application relates to the field of photoelectric technology, especially to organic light-emitting material, organic electroluminescent device and preparation thereof. The organic light-emitting material based on acephenanthrylene derivative and the organic electroluminescent device thereof, the material is fused through benzene ring, ensures that the excited state has high oscillator strength, is conducive to radiation transition, and the rigid fused ring structure can effectively inhibit intramolecular vibration, helps to inhibit the non-radiative transition behavior of the excited state and obtain high photoluminescence efficiency, in addition, the molecule can form intermolecular charge transfer aggregate to reduce the non-adiabatic coupling of electrons, so as to realize low non-radiative transition rate, further improve the photoluminescence efficiency, and also can stabilize the excited state energy, can be further applied to organic electroluminescent device, realizes high electroluminescence efficiency.

This invention belongs to the field of carbon materials technology, and discloses a high-nuclear-core copper fullerene complex, its preparation method, and its applications. The chemical formula of this high-nuclear-core copper fullerene complex is 6(C7H). 10 N) + [Cu 30 Cl 36 (C 60 (C7H9N) 12 ] 6‑ ·3C7H9N. In this high-nuclearity copper fullerene complex, C 60 Provides a copper source with C=C double bonds, cuprous oxide as a monovalent copper ion, benzylamine, and Cl. ‑ To assist in coordination, high-nuclear copper fullerene complexes can absorb most of the near-infrared light, and the non-radiative transitions of the molecules are greater than the radiative transitions. They have high photothermal conversion efficiency and good electrical conductivity, as well as good photothermal stability, and can be recycled multiple times.

The application provides an excimer acceptor material based on a nitrogen heterocycle, a preparation method and application thereof, and belongs to the technical field of organic photoelectric materials. Two excimer acceptor materials are synthesized by combining 2-phenyl-4,6 di(4-pyridine)-1,3,5-triazine with spirobifluorene and pyridine. The synthesis method is simple, the yield is high, and the excimer acceptor material has good electrochemical stability. The spirobifluorene is added to improve the molecular rigidity, reduce non-radiative transition and reduce efficiency roll-off. The pyridine is added to deepen the LUMO level, which is conducive to the development of red excimer OLED. The synthesized excimer acceptor material is combined with a donor material to form an excimer, which is used as a light-emitting layer of an organic electroluminescent device. The excimer can realize yellow light and orange red light emission, has a high external quantum efficiency, and the highest external quantum efficiency can reach 11.5%. The excimer has a wide application prospect and can be widely applied in the fields of flat panel display and solid state lighting.

The application discloses an organic-inorganic hybrid perovskite glass material with long afterglow phosphorescence and a preparation method thereof. The method is to use metal salt and organic ion salt as raw materials, and a low-cost melt quenching method without any solvent participation is used to obtain the organic-inorganic hybrid perovskite glass material with long lifetime phosphorescence. There is a strong intramolecular interaction between the metal salt anion and the organic cation, which can greatly inhibit the thermal vibration and non-radiative transition of the organic luminescent group; in addition, the formation of the glass provides a rigid molecular environment for the chromophore. The organic-inorganic hybrid perovskite glass material prepared by the application has high transparency, high hardness and high-efficiency long-lifetime phosphorescence emission performance. The preparation method of the application has low cost, simple operation and is easy to mass industrial production, and has wide application prospects in the fields of anti-counterfeiting, information security and decoration.

This invention belongs to the field of chemical / biological sensing technology, and relates to the preparation method of barium acetate open framework-based probe materials and their application in L-glutamic acid detection. This invention prepares the host-guest doped material P@1 (P is 1,4-naphthalenedicarboxylic acid, and 1 is C4H6BaO4) via a solvothermal evaporation method. P@1 exhibits a visible green RTP with a duration of approximately 3 s. In terms of detection, P@1 shows a selective phosphorescence-enhanced response to L-Glu, with a detection limit of 0.938 μmol·L⁻¹. ‑1 The detection mechanism primarily involves hydrogen bonding between L-glutamic acid and P@1, which restricts the movement of guest molecules, thereby reducing non-radiative transition pathways and promoting radiative transitions, ultimately leading to enhanced phosphorescence intensity. Finally, this method was developed into a pH test strip, which exhibits significant advantages in amino acid detection, including high sensitivity, speed, simplicity, and low cost, providing a new method for efficient amino acid detection.

The invention relates to the technical field of preparation of organic photoelectric materials, in particular to a boron-nitrogen compound, an organic electroluminescent device comprising the same and application of the boron-nitrogen compound. According to the boron-nitrogen compound provided by the invention, a benzene ring is introduced to a donor unit to increase the conjugate length of a donor skeleton, so that on one hand, the HOMO energy level of luminescent molecules is regulated and controlled, and hole transport between a hole transport layer (or an electron blocking layer) and a luminescent layer is facilitated; on the other hand, the carrier transmission performance between host and guest molecules is improved; meanwhile, due to the introduction of a large-steric-hindrance spiro ring and a substituted spiro ring group, the aggregation quenching effect among luminescent molecules is effectively inhibited, and non-radiative transition is inhibited. When the boron-nitrogen compound is used as a luminescent layer material to manufacture an organic electroluminescent device, the current efficiency of the device is improved, the service life of the device can be greatly prolonged, and the boron-nitrogen compound has better application value.

The invention relates to the technical field of synthesis of luminescent materials, and particularly provides a Sb (III)-based metal halide glass material and a preparation method thereof. The chemical expression of the material is as follows: (C18H15S) 2SbCl5, the glass material has an isotropic amorphous structure. The method comprises the following steps: step 1, coprecipitating antimony chloride and organic sulfonium salt in a DMF (Dimethyl Formamide) solution to obtain a product; 2, melting the heating product at a first preset temperature to obtain a precursor; 3, heating the precursor at a second preset temperature to obtain a clear and transparent mixed solution; and step 4, pouring the clear and transparent mixed solution into a mold to obtain the Sb (III)-based metal halide glass. In the material provided by the invention, the isotropic distribution characteristic provided by a glass disordered network, the strong local light-emitting mechanism of the Sb-Cl coordination unit and the dual limitation of organic cations on structure and energy migration jointly inhibit the formation of a non-radiative transition channel under a heating condition, so that the (C18H15S) 2SbCl5 glass material shows better thermal stability.

The invention discloses a design and preparation method of a series of D-A type organic polymer materials and photo-thermal performance research of the D-A type organic polymer materials. The three synthesized polymer photo-thermal materials are all prepared by taking [1, 2, 5] thiadiazole [3, 4-g] quinoxaline-6, 7-dicarboxylate (BTQ) as acceptors and adopting three donor groups with different conjugation degrees, and charge transfer in molecules is enhanced by introducing BTQ strong electron-withdrawing acceptor groups, so that red shift of an absorption spectrum is promoted. Secondly, after long-chain alkyl is introduced into a D-A main chain, a larger intramolecular rotation space is provided for the polymer, so that non-radiative transition is enhanced, and the photothermal conversion efficiency is improved. In addition, by comparing the photo-thermal properties of the three, the interaction mechanism of conjugate extension and molecular movement is explored. The D-A type organic photo-thermal material with excellent solar spectrum matching characteristic and high non-radiation decay capability is finally developed, and the D-A type organic photo-thermal material has important scientific significance and application value in the photo-thermal field.

The invention discloses a polycrystalline organic eutectic material as well as a preparation method and application thereof, and belongs to the technical field of organic luminescent materials. According to the invention, a polycrystalline organic eutectic crystal 1-BrTC composed of an electron acceptor TCNB and an electron donor 1-BrDBT is synthesized. And carrying out self-assembly in different crystallization environments to obtain two polycrystalline crystals with obviously different emission colors, which are respectively named as g-eutectic and y-eutectic. Experimental results show that spin-orbit coupling is enhanced through multiple halogen bond effects in the g-eutectic, intersystem crossing and anti-intersystem crossing processes are remarkably accelerated, and thermal activation delayed fluorescence emission is enhanced. Besides thermally activated delayed fluorescence, singlet radiation attenuation and triplet non-radiative transition are inhibited by stronger hydrogen-bond interaction in the y eutectic, and room-temperature phosphorescence emission is realized. A new thought is provided for effective utilization of triplet excitons in the polycrystalline organic eutectic, and reasonable design of a novel luminescent material is facilitated.

The application belongs to the technical field of organic photoelectric materials, and provides a boron-nitrogen-containing multi-heterocyclic material and an organic electroluminescent device containing the same. The boron-nitrogen-containing multi-heterocyclic material provided by the application is a novel sensitization material and a doping material with a boron-nitrogen six-membered heterocyclic ring as a molecular skeleton center and containing a multi-benzene ring structure. The structure has good stability, can inhibit molecular vibration relaxation and reduce non-radiative transition, and thus a better service life is achieved. Meanwhile, the material has good high-exciton utilization and small ΔEST, can more easily realize intersystem crossing, and achieve better photoelectric conversion efficiency.

The application provides a DFT calculation model optimization method for vibration-electron interaction in X-type double-spiralene configuration, and belongs to the technical field of quantum chemistry multi-scale calculation; first, experimental data of X-type double-spiralene material is obtained through spectral technology, and microscopic detailed data is obtained through quantum chemistry DFT calculation, so that the energy barrier, vibration spectrum, electron cloud density and molecular orbital energy level data of the X-type double-spiralene material are obtained. For the molecular aggregate state, the periodic DFT and molecular mechanics MM coupling method is used, the active area is described by DFT, and the weak interaction area is processed by MM, and the periodic characteristics of the energy band structure are calculated based on the mixed precision calculation framework. The multi-scale coupled DFT algorithm is used to correlate the vibration-electron interaction at the atomic scale with the energy band structure, non-radiative transition and other mesoscopic characteristics of the molecule, and the macroscopic photoelectric characteristics of the material are output, so that the calculation closed loop from the micro to the macro is completed.

The invention discloses a red light emitting material based on a pyridine imine boron difluoride receptor as well as a preparation method and application of the red light emitting material, and belongs to the field of organic photoelectric materials. The red light emitting material based on the pyridine imine boron difluoride acceptor has a structure as shown in a formula I, a nitrogen-containing heterocyclic ring is taken as an electron donor, pyridine imine boron difluoride is taken as an electron acceptor, a D-A-D structure with strong electron donating and electron withdrawing groups is formed, a large space conjugated system is formed, narrow-band system dark red light emission is realized, and the red light emitting efficiency is improved. A non-radiative transition path is reduced, and the luminous efficiency of the material is improved. The compound has proper HOMO energy level and LUMO energy level by regulating and controlling the electron cloud distribution of a molecular front track, is beneficial to matching with each functional layer of a device, reduces the working voltage of the device, and improves the luminous efficiency of the device. Due to the existence of boron difluoride, the conformation of the material is diversified, and under the stimulation of external mechanical force, the material can generate the change of luminescence displacement, so that the material can be applied to an information encryption device.

The application discloses a D-A-D type organic small molecule, nanoparticles containing the same, and a preparation method and application thereof. The D-A-D type organic small molecule and the nanoparticles thereof are particularly suitable for precise photothermal treatment and real-time imaging guidance of hematological malignancies such as leukemia, lymphoma and multiple myeloma. The D-A-D type organic small molecule constructs a D-A-D type conjugated structure, realizes near-infrared absorption red shift to 685 nm through enhancing intramolecular charge transfer (ICT) effect, and promotes non-radiative transition by using high excited state reorganization energy (lambda=1.29eV), with a photothermal conversion efficiency of more than 35%. The small molecule does not contain metal and halogen, has a molecular weight of about 878 Da, and has good biocompatibility and metabolic potential. The small molecule is self-assembled into nanoparticles with a particle size of about 130 nm, and has good colloidal stability and passive targeting ability. Meanwhile, the high molar absorption coefficient and high-efficiency photothermal conversion characteristics of the small molecule endow the small molecule with strong photoacoustic imaging capability, and the small molecule can be used for real-time monitoring of drug distribution and realization of 'diagnosis and treatment integration'.

The invention relates to a compound and a preparation method thereof, a thin film and a light-emitting device. The compound has a structure as shown in a formula I. According to the compound, distribution of three atoms B, N and O is reasonably designed, a stable electron-withdrawing deep LUMO central structure composed of the atoms B is formed, N and O are introduced to the periphery to form an electron-donating shell layer, a rigid core-shell structure is formed, and the structure can still keep narrower FWHM when inducing a larger degree of long-range ICT red shift effect, so that the compound has a wide application prospect. And the device efficiency can be improved. And secondly, the rigid core-shell structure is beneficial to weakening non-radiative transition of molecules caused by vibration relaxation, so that the spectrum can be narrowed, and the device efficiency can be improved.

The invention discloses a bi-state emission phenanthroimidazole blue light material with high radiation transition rate and application thereof, the molecular structure of the blue light material takes phenanthroimidazole with bipolar characteristic as a core unit and takes different functional groups as electron donor or acceptor units to construct an efficient blue fluorescence system. Specifically, a methyl phenyl group is introduced to the C2 position of phenanthroimidazole, so that the blue light-emitting characteristic of the material is effectively maintained; meanwhile, different functional groups are introduced to the N1 site, so that the fine adjustment of the emitted light color is realized, and the radiative transition rate is remarkably improved. The preparation method of the blue-light-emitting material is simple and convenient, the blue-light-emitting material is easy to purify, and the blue-light-emitting material has the advantages of high radiation transition rate and high fluorescence quantum yield and has important application prospects in the field of organic light-emitting diode display.

This invention relates to a class of thermally activated delayed fluorescence materials containing dicarbonyl groups and their applications, belonging to the field of electroluminescent materials technology. The material uses a dicarbonylquinoline group with intramolecular hydrogen bonding and a twisted spatial configuration as its core, introducing O, S, and Se atoms at the meta position of the carbonyl group. By utilizing heteroatom and heavy atom effects, the electronic structure and excited-state properties of the molecule are precisely controlled, increasing the spin-orbit coupling (SOC) strength of the molecule. While maintaining a small energy level difference, it increases the anti-system crossing rate, thereby promoting a balance between the anti-system crossing rate and the radiative transition rate. Furthermore, the intramolecular hydrogen bonds enhance the molecule's rigidity, suppressing excited-state vibrational relaxation, thus achieving high fluorescence quantum yield and narrow-band emission, thereby improving luminescence efficiency. The material of this invention exhibits excellent optoelectronic properties, providing an ideal material solution for fabricating high-efficiency and low-roll-off OLED devices.

This invention discloses a dual-resonance composite nanoantenna structure for enhancing the luminescence of monolayer molybdenum disulfide and its fabrication method. The structure includes an antenna substrate, a base assembly disposed on the surface of the antenna substrate, and multiple dual-resonance nanoantenna mechanisms disposed on the surface of the base assembly. An alumina top layer is disposed between the multiple dual-resonance nanoantenna mechanisms and the base assembly. This invention utilizes the strong localized surface plasmon hotspot effect generated by the nano-gap between the top-layer metal dimers to significantly improve the absorption efficiency and exciton generation rate of the intermediate molybdenum disulfide layer for incident light. Simultaneously, the high-Q Mie resonance supported by the bottom dielectric nanodisk serves as an optical microcavity, effectively suppressing non-radiative transitions and enhancing far-field radiation extraction capability. The synergistic effect of these two elements achieves an order-of-magnitude increase in the photoluminescence intensity of molybdenum disulfide.

A 2D perovskite compound, a preparation method thereof and a multicolor long afterglow luminescence application, adopt HOF type organic ligand, can inhibit the non-radiative transition of triplet state, so that a long afterglow compound with good performance, high phosphorescence quantum yield and stability is obtained. The halide perovskite has the characteristics of excitation-dependent fluorescence and phosphorescence, and the fluorescence and phosphorescence luminescence color can be from blue to green and from cyan to yellow. Interestingly, the sample can emit blue and yellow long afterglow after the different excitation light sources are turned off, so that multicolor visual afterglow adjustment can be realized, and applied to multicolor anti-counterfeiting. At the same time, the potential application of the material in the fields of anti-counterfeiting and encryption is shown.

The invention belongs to the technical field of organic electroluminescence preparation, and particularly relates to a platinum (II) complex guest phosphorescent material with a spirofluorene structure, an electronic device, a device and application of the platinum (II) complex guest phosphorescent material. The core of the invention lies in that a rigid spirofluorene fragment with large steric hindrance is introduced into N-heterocyclic carbene of the platinum (II) complex, so that the molecular rigidity is remarkably enhanced, the structural deformation between a ground state and an excited state is reduced, and non-radiative decay caused by molecular vibration is fundamentally inhibited. Substituent groups are introduced to 2 ', 7' positions of 9, 9 '-spirobifluorene to increase steric hindrance, light-emitting quenching caused by molecular aggregation is inhibited, non-radiative transition can be further inhibited, and quantum efficiency is improved. The quantum efficiency of an organic light-emitting device manufactured by using the compound as a light-emitting layer is obviously improved.

The application discloses a kind of triquetrum-like platinum complexes, belong to electroluminescence technical field, the structure general formula of the triquetrum-like platinum complex is as shown in the following formula (I) and (II) described in formula:Wherein, Ar1 It is independently selected from the substituted or unsubstituted arylene of carbon atom number 6~12, the substituted or unsubstituted heteroarylene of carbon atom number 6~12 one kind;R1, R2 Each is independently selected from H, the alkyl of carbon atom number 1~5 and the aryl of carbon atom number 6~12 one kind;L1 It is bidentate chelate anion ligand.The triquetrum-like skeleton of the application is compared with the chiral structure that has been applied in photoelectric field, it is not easy to twist and bend, has good rigidity, can inhibit the non-radiative transition of molecule;Stereoconfiguration is stable and not easy to racemize, under the condition of separation and device preparation etc. high optical activity is maintained under illumination or heating, so it has circularly polarized luminescence property (CPL), high fluorescence quantum yield.

The application belongs to the technical field of organic electroluminescent materials, and particularly relates to an organic electroluminescent device, which synchronously greatly improves the luminous efficiency and service life of the organic electroluminescent device through deuterium modification of the structure of a compound and optimization of the collocation between a sensitizer and a guest. In terms of efficiency, the guest and the sensitizer have similarity due to structural homology, can form a uniform film, and lay a stable foundation for energy transfer; the guest and the sensitizer adjust the energy level difference through structural difference, realize efficient carrier capture and directional transfer, thereby inhibiting non-radiative transition, reducing exciton energy dissipation, significantly improving the fluorescent quantum yield, and guaranteeing efficient light emission. In terms of life, the high bond energy of the C-D bond effectively inhibits molecular cleavage, reduces material loss from the root, and the moderate deuteration of the sensitizer can further optimize the transmission stability inside the device, thereby greatly prolonging the long-term service life of the device.

The application belongs to the technical field of organic electroluminescent materials, and particularly relates to a thermally activated delayed fluorescence material and an organic electroluminescent device thereof, wherein through precise design of an outer carbazole derivative part deuterium substitution, efficient balance of cost, stability and photoelectric performance is achieved. In terms of photoelectric performance, the outer carbazole part deuterium substitution retains the hole transport characteristics of carbazole, the low vibration frequency of C-D bond inhibits non-radiative transition, and the quantum efficiency is improved. Meanwhile, the cost of the carbazole part deuterium substitution is also lower than that of full deuterium substitution, which is conducive to reducing the production cost.