Search

CN-122012082-A - Organic electroluminescent device and lighting or display device comprising same

CN122012082ACN 122012082 ACN122012082 ACN 122012082ACN-122012082-A

Abstract

The invention relates to the technical field of organic photoelectric material preparation, in particular to an organic electroluminescent device and an illumination or display device containing the organic electroluminescent device. In the invention, the boron-nitrogen compound with triphenylsilane group, carbazole and alkyl are adopted as the light-emitting doping material, and the defined triarylamine compound is adopted as the light-emitting auxiliary material, so that the light-emitting efficiency of the organic light-emitting device can be effectively improved by combined application in the device, and the application prospect is good.

Inventors

  • ZHANG LEI
  • LI HONGEN
  • ZHANG HUAXING
  • WU KONGWU
  • YANG XIWEN
  • ZHAO XIAOYU

Assignees

  • 浙江华显光电科技有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (12)

  1. 1. An organic electroluminescent device, comprising A substrate layer; A first electrode over the substrate; An organic light emitting functional layer over the first electrode; a second electrode over the organic light emitting functional layer; wherein the organic light emitting functional layer comprises a light emitting layer comprising a doping material of the structure of formula I: ; Wherein X 1 is selected from O or S, R 1 、R 2 is independently selected from mono-substituted, di-substituted or poly-substituted R 1 、R 2 、R 3 、R 4 is independently selected from hydrogen, deuterium, C1-C12 alkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C5-C36 heteroaryl, wherein the substitution in the substitution or the unsubstituted is selected from one or more of hydrogen, deuterium, C1-C12 alkyl and C3-C24 cycloalkyl, D is deuterium, and n is an integer of 0-15; The organic light-emitting functional layer further comprises a light-emitting auxiliary layer, and the light-emitting auxiliary layer is made of a material with a structure shown in a formula II: ; Wherein L, L 1 、L 2 is independently selected from single bond, C6-C30 arylene, X is selected from O or S atom, ar 1 、Ar 2 is independently selected from deuterated or non-deuterated C6-C30 aryl, deuterated or non-deuterated C5-C36 heteroaryl, ra and Rb are independently selected from hydrogen, deuterium and phenyl, at least one of Ra and Rb is selected from phenyl, n1 is selected from integer of 0-3, and n2 is selected from integer of 0-4.
  2. 2. The device of claim 1, wherein in formula I, R 1 、R 2 is independently selected from hydrogen, deuterium, methyl, ethyl, propyl, t-butyl, C1-C4 alkyl substituted or unsubstituted carbazolyl, and at least one is selected from C1-C4 alkyl substituted or unsubstituted carbazolyl.
  3. 3. The organic electroluminescent device of claim 1, wherein in formula I, R 1 is di-or poly-substituted, R 1 is each independently selected from hydrogen, deuterium, methyl, ethyl, propyl, t-butyl, C1-C4 alkyl substituted or unsubstituted carbazolyl, and one of them is C1-C4 alkyl substituted or unsubstituted carbazolyl, R 2 is mono-, di-or poly-substituted, and R 2 is each occurrence selected from hydrogen, deuterium, methyl, ethyl, propyl, t-butyl, the same or different from each other.
  4. 4. The organic electroluminescent device of claim 1, wherein in formula I, R 3 is independently selected from hydrogen, deuterium, methyl, ethyl, propyl, t-butyl, phenyl, t-butylphenyl, tetramethyl tetrahydronaphthyl.
  5. 5. The organic electroluminescent device of claim 1, wherein in formula I, R 4 is independently selected from hydrogen, deuterium, methyl, ethyl, propyl, tert-butyl.
  6. 6. The organic electroluminescent device of claim 1, wherein the doping material in the light-emitting layer is selected from any one or more of the following structures, wherein tBu represents tert-butyl and D represents deuterium: 。
  7. 7. The device of claim 1, wherein in formula II, L 1 、L 2 is independently selected from the group consisting of single bond, phenylene, naphthylene, ar 1 、Ar 2 is selected from the group consisting of phenyl, naphthyl, phenyl-substituted naphthyl, dibenzofuranyl, which are deuterated or non-deuterated.
  8. 8. The organic electroluminescent device of claim 1, wherein in formula II, L is selected from phenylene or biphenylene.
  9. 9. The organic electroluminescent device of claim 1, wherein the light-emitting auxiliary layer is selected from any one or more of the following structures, wherein D represents deuterium: 。
  10. 10. Use of an organic electroluminescent device as claimed in any one of claims 1 to 7 for the preparation of a display or lighting apparatus.
  11. 11. A display or lighting device, characterized in that the device comprises an organic electroluminescent device as claimed in any one of claims 1 to 7.
  12. 12. A composition comprising a compound of the structure of formula I: ; Wherein X 1 is selected from O or S, R 1 、R 2 is independently selected from mono-substituted, di-substituted or poly-substituted R 1 、R 2 、R 3 、R 4 is independently selected from hydrogen, deuterium, C1-C12 alkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C5-C36 heteroaryl, wherein the substitution in the substitution or the unsubstituted is selected from one or more of hydrogen, deuterium, C1-C12 alkyl and C3-C24 cycloalkyl, D is deuterium, and n is an integer of 0-15; Including materials having the structure of formula II: ; Wherein L, L 1 、L 2 is independently selected from single bond, C6-C30 arylene, X is selected from O or S atom, ar 1 、Ar 2 is independently selected from deuterated or non-deuterated C6-C30 aryl, deuterated or non-deuterated C5-C36 heteroaryl, ra and Rb are independently selected from hydrogen, deuterium and phenyl, at least one of Ra and Rb is selected from phenyl, n1 is selected from integer of 0-3, and n2 is selected from integer of 0-4.

Description

Organic electroluminescent device and lighting or display device comprising same Technical Field The invention relates to the technical field of organic photoelectric material preparation, in particular to an organic electroluminescent device and an illumination or display device containing the device. Background Organic Light Emitting Diodes (OLEDs), also known as organic electroluminescent devices, are techniques in which holes are injected from an anode and electrons from a cathode into a light emitting layer, respectively, by applying a voltage to an organic electroluminescent element, and the injected holes recombine with electrons to form excitons, resulting in light emission, which can convert electrical energy into light energy through an organic light emitting material. The existing luminescent materials still have the defects in improving the performance of the device, and even if a plurality of materials are used in combination, the display technology still has the problems of high driving voltage and short display service life, and the further practicability of the technology is seriously affected. The existing boron-nitrogen luminescent doping material still has room for improvement in the indexes of service life and luminous efficiency in device application. Accordingly, there is a need for continued efforts to develop an organic light emitting device having low voltage driving, high luminance, and long lifetime to solve the above-mentioned problems. Disclosure of Invention In order to solve the technical problems, the invention provides an organic electroluminescent device and a display or lighting device containing the device. In the organic electroluminescent device, the luminescent doping material is obtained by iteratively improving the luminescent doping material and adopting the triarylsilyl, carbazole and alkyl as key groups on the boron-nitrogen parent nucleus structure, and the luminescent doping material is applied by matching with the limited luminescent auxiliary material, so that the device has higher luminescence and service life, and particularly, the service life is obviously improved. The invention provides an organic electroluminescent device, which is realized by the following technical scheme: an organic electroluminescent device comprising: A substrate layer; A first electrode over the substrate; An organic light emitting functional layer over the first electrode; a second electrode over the organic light emitting functional layer; wherein the organic light emitting functional layer comprises a light emitting layer comprising a doping material of the structure of formula I: ; Wherein X 1 is selected from O or S, R 1、R2 is independently selected from mono-substituted, di-substituted or poly-substituted R 1、R2、R3、R4 is independently selected from hydrogen, deuterium, C1-C12 alkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C5-C36 heteroaryl, wherein the substitution in the substitution or the unsubstituted is selected from one or more of hydrogen, deuterium, C1-C12 alkyl and C3-C24 cycloalkyl, D is deuterium, and n is an integer of 0-15; The organic light-emitting functional layer further comprises a light-emitting auxiliary layer, and the light-emitting auxiliary layer is made of a material with a structure shown in a formula II: ; Wherein L, L 1、L2 is independently selected from single bond, C6-C30 arylene, X is selected from O or S atom, ar 1、Ar2 is independently selected from deuterated or non-deuterated C6-C30 aryl, deuterated or non-deuterated C5-C36 heteroaryl, ra and Rb are independently selected from hydrogen, deuterium and phenyl, at least one of Ra and Rb is selected from phenyl, n1 is selected from integer of 0-3, and n2 is selected from integer of 0-4. Preferably, the hydrogen atoms in the structures of formula I, formula II may be partially or fully deuterated. Preferably, in formula II, ra and Rb are selected from phenyl groups, and the phenyl groups are linked by a single bond or by a fused manner. Preferably, in the formula I, R 1、R2 is independently selected from hydrogen, deuterium, methyl, ethyl, propyl, tertiary butyl and C1-C4 alkyl substituted or unsubstituted carbazolyl, and at least one is selected from C1-C4 alkyl substituted or unsubstituted carbazolyl. Preferably, in the formula I, R 1 is di-substituted or poly-substituted, R 1 is independently selected from hydrogen, deuterium, methyl, ethyl, propyl, tertiary butyl, C1-C4 alkyl substituted or unsubstituted carbazolyl, one of which is C1-C4 alkyl substituted or unsubstituted carbazolyl, R 2 is mono-substituted, di-substituted or poly-substituted, and R 2 is selected from hydrogen, deuterium, methyl, ethyl, propyl and tertiary butyl in each occurrence. Preferably, in formula I, R 3、R4 is each independently selected from hydrogen, deuterium, methyl, ethyl, propyl, tert-butyl, phenyl, tert-butylphenyl, tetramethyltetralin. More preferably, in the formula I, R 3 is selecte