53results about How to "Improve exciton utilization" patented technology

The invention provides a nitrogen-containing fused-heterocyclic compound and a preparation method thereof and relates to the field of OLED (organic light emitting diode) materials. The structural formula of the compound is shown in the description, in the formula, R1, R2 and R3 are independently selected from hydrogen, heavy hydrogen, cyanogroup, halogen atoms, substituted or unsubstituted C1-C20straight-chain or branched alkyl, substituted or unsubstituted C6-C30 aromatic hydrocarbons and substituted or unsubstituted C5-C30 heterocyclic aromatic hydrocarbons. After being applied to an OLED device, the compound provided by the invention is capable of effectively increasing the utilization rate of excitons, reducing the voltage of the device, improving the current efficiency of the deviceand prolonging the service life of the device. The compound provided by the invention has a good application effect in OLED light-emitting devices and has a good industrial prospect. In addition, thecompound is simple in preparation method and possible in large-scale industrial production.

The invention discloses compounds taking xanthone as a core and application of the compounds, and belongs to the technical field of semiconductors. The structure of the compounds provided by the invention is shown as a general formula (1) shown in the description. The compounds have a xanthone mother nucleus structure, have relatively high glass transition temperature and molecular thermal stability, proper HOMO and LUMO energy levels and relatively high Eg, and can effectively improve the photoelectric properties of an OLED device and prolong the service lifetime of the OLED device by optimizing the device structure.

The invention discloses an organic light-emitting molecule and application thereof in an organic light-emitting diode. The molecule has the characteristics of wide band gap, high fluorescence quantumyield, high electron mobility, high hole mobility, high exciton utilization rate, and the like. The molecule has an asymmetric structure, and can inhibit molecular aggregation and reduce exciton quenching. In addition, the emission spectrum can be adjusted by changing the connection sites of two units. The organic light-emitting molecule can be used for preparing high-efficiency blue light organiclight-emitting devices with different emission wavelengths.

The invention provides binuclear cyclic metal platinum (III) complex near-infrared light emitting materials. Compared with disclosed most cyclic platinum (II) complexes, the materials have obviously different advantages and characteristics: (1) an electron donor (D) group with a cavity transmission function is introduced to be combined with an electron-withdrawing oxadiazole (A) group with an electron transmission function to construct a D-A form anion assisted ligand, which facilitates the formation of a binuclear trivalent cyclic metal platinum (III) complex and improvement of the carrier transport balance and the exciton utilization ratio of molecules; (2) the nonplanar platinum (III) complex inhibits concentration quenching effectively; and (3) by introducing anions X, the molecular band gaps are reduced for red shift of light emission of the platinum (III) complex. The ionic binuclear cyclic metal platinum (III) complex can be applied to a light emitting layer of a near-infrared electroluminescence device as a light emitting material, so that the electroluminescence device emits near-infrared rays efficiently.

The invention belongs to the scientific and technical field of optoelectronic material application, and particularly relates to an organic photoelectric material and application thereof. The organic photoelectric material comprises phenanthroimidazole and triazine as basic structural units to form a thermotropic delayed fluorescent material, linkage or thickening of triazine and imidazole groups with strong electron-donating properties and phenanthrene groups with large conjugate planes effectively improves the roll-off of devices, further modification of functional groups with strong electron-withdrawing properties improves exciton transport and luminescence properties of the devices under high current density, and the organic photoelectric material is an ideal material for luminous layers, electron transport or light emitting layers of the organic electroluminescent devices.

The invention relates to an organic light emitting device with pyridine compounds. The organic light emitting device has the advantages that an electron barrier layer or a light emitting layer of theorganic light emitting device contains compounds represented by a general formula (1), and accordingly the organic light emitting device is high in efficiency, long in service life and low in cost; the electron barrier layer or the light emitting layer of the organic light emitting device comprises compound molecules represented by the general formula (1), accordingly, electrons and holes can be distributed in the light emitting layer in a balance manner, and the hole injection and transport performance can be enhanced under the condition of appropriate HOMO (highest occupied molecular orbital) energy level; the exciton utilization rate can be effectively increased by the compounds represented by the general formula (1), the high-fluorescence radiation efficiency can be effectively improved by the compounds represented by the general formula (1), the efficiency roll-off under the condition of high current density can be reduced, and voltages of the organic light emitting device can bereduced; the exciton utilization rate can be effectively increased when the compounds are used as light emitting functional layer materials for the OLED (organic light emitting device), the high-fluorescence radiation efficiency can be effectively improved, the efficiency roll-off under the condition of the high current density can be reduced, the voltages of the organic light emitting device canbe reduced, the current efficiency of the organic light emitting device can be improved, and the service life of the organic light emitting device can be prolonged.

The invention discloses a compound based on oxidized thioxanthone, a preparation method and an application thereof, and belongs to the technical field of organic photoelectric materials. It has the structure shown in formula I: the compound based on thioxanthone oxide of the present invention is not easy to crystallize between molecules, not easy to aggregate, and has good film-forming properties, and the rigid group in the molecule can improve the thermal stability of the material , while the compound of the present invention has a D-A structure, and the distribution of electrons and holes is more balanced. When used as a light-emitting layer material in an OLED device, the efficiency roll-off at high current densities of the device decreases, the drive voltage of the device decreases, and the current of the device Increased efficiency and longevity.

The invention belongs to the field of optoelectronic materials, and discloses a non-aromatic amine small molecule optoelectronic material as well as its preparation and application. Described non-aromatic amine small molecule optoelectronic material has the structural formula shown in formula (I); In the formula, R 1 selected from H or ‑CH 3 , R 1 , R 2 , R 3 , R 4 each independently selected from S or O. The non-aromatic amine small molecule photoelectric material of the present invention has good hole transport ability, can be applied to the hole transport layer of organic photoelectric devices, and can also be combined with commonly used electron transport materials to generate exciplex state light emission , showing a high fluorescence quantum yield and exhibiting the property of thermally activated delayed fluorescence.

The invention discloses an organic white light-emitting device based on a stepped multi-reaction intersystem crossing process and a preparation method thereof. The light-emitting layer is formed of at least two of MCP, DMAC-DPS, 4CzPNPh and PO-T2T materials The composition of exciplexes, the light-emitting layer has a light-emitting layer structure with a stepwise multi-transverse intersystem crossing process. The anti-intersystem crossing rate of excitons is effectively improved, the utilization rate of excitons is greatly improved, and the fluorescence quantum yield of the device is improved at the same time, which improves the problem of low exciton utilization rate of traditional all-fluorescent devices. The advantages of fluorescence, high anti-system crossing rate, and high fluorescence quantum yield effectively improve the luminous efficiency of white light devices.

The invention discloses a compound with 9-fluorenone as the core and an application thereof. The compound uses 9-fluorenone as the core, and has the characteristics of difficult crystallization and aggregation between molecules and good film-forming properties. The compound of the present invention is used as a light-emitting layer material in organic light-emitting diodes, has good photoelectric properties, and can better adapt to and meet the application requirements of panel manufacturing enterprises.

The invention belongs to the field of organic photoelectric materials, and discloses a non-aromatic amine small molecule material with high exciton utilization rate and its application. The non-aromatic amine high exciton utilization rate small molecule material has a general structural formula shown in formula (I), wherein R 1 , R 2 and R 3 It is the donor unit of thioxanthene, dibenzothiophene or dibenzofuran derivatives. The material obtained by the invention has a single structure, clear molecular weight, does not contain traditional aromatic amine units, and is used in the light-emitting layer of an organic light-emitting device, reflecting a greatly improved exciton utilization rate.