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Bipolar OLED (organic light-emitting diode) phosphorescence main body material and luminescent device containing material

A light-emitting device and light-emitting layer technology, applied in the field of OLED materials and light-emitting devices, can solve the problems of triplet-triplet annihilation acceleration, rapid decline in device efficiency, etc., to reduce phosphorescence quenching, increase glass transition temperature and thermal decomposition The effect of high temperature and stability

Active Publication Date: 2016-08-24
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Narrow exciton recombination regions lead to accelerated triplet-triplet annihilation, leading to a rapid drop in device efficiency especially at high voltages

Method used

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  • Bipolar OLED (organic light-emitting diode) phosphorescence main body material and luminescent device containing material
  • Bipolar OLED (organic light-emitting diode) phosphorescence main body material and luminescent device containing material
  • Bipolar OLED (organic light-emitting diode) phosphorescence main body material and luminescent device containing material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 The preparation of compound C02

[0034]

[0035] 1) Under nitrogen protection, the raw material 3,6-dibromoxanthone (1.77g, 5mmol), phenoxazine (2.02g, 11mmol) and 150mL toluene were added to a 250mL three-necked flask, and then the catalyst palladium acetate ( 0.022g, 0.1mmol) and catalyst ligand tri-tert-butylphosphine tetrafluoroborate (0.058g, 0.2mmol), acid-binding agent potassium carbonate (2.07g, 15mmol). The system was heated to reflux and stirred for 10 hours, then cooled naturally to 20-25°C, then 50 mL of water was added to quench the reaction, the liquid was separated, the solvent was removed, and the crude product was crystallized with toluene to obtain 2.23 g of intermediate C02-a with a yield of 79.9%.

[0036] High resolution mass spectrometry, ESI source, positive ion mode, molecular formula C 37 h 22 N 2 o 4 , the theoretical value is 558.1580, and the test value is 558.1576. Elemental analysis (C 37 h 22 N 2 o 4 ), theoretica...

Embodiment 2

[0041] The preparation of embodiment 2 compound C03

[0042]

[0043] The synthesis method refers to the preparation method of C02, and the total yield is 26.5%.

[0044] High resolution mass spectrometry, ESI source, positive ion mode, molecular formula C 67 h 51 N 2 o 2 P, theoretical value 946.3688, test value 946.3683. Elemental analysis (C 67 h 51 N 2 o 2 P), theoretical value C: 84.97, H: 5.43, N: 2.96, O: 3.38, P: 3.27, measured value C: 84.96, H: 5.44, N: 2.96, O: 3.36, P: 3.29.

Embodiment 3

[0045] The preparation of embodiment 3 compound C04

[0046]

[0047] The synthesis method refers to the preparation method of C02, and the total yield is 23.6%.

[0048] High resolution mass spectrometry, ESI source, positive ion mode, molecular formula C 61 h 39 N 2 o 2 P, theoretical value 862.2749, test value 862.2751. Elemental analysis (C 61 h 39 N 2 o 2 P), theoretical value C: 84.90, H: 4.56, N: 3.25, O: 3.71, P: 3.59, measured value C: 84.91, H: 4.57, N: 3.25, O: 3.71, P: 3.59.

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Abstract

The invention relates to an OLED (organic light-emitting diode) material, which is characterized in that a spiro[fluorine-9,9'- xanthenes] and triphenylphosphine oxide structure is used as a core; in addition, the general structure formula is shown as the accompanying drawing, wherein the Ar1 and the Ar2 are independently selected from hydrogen and polycyclic aromatic groups containing heteroatoms; in addition, the Ar1 and the Ar2 are not simultaneously hydrogen. The invention also provides a method for preparing the OLED material. The invention also provides a luminous device using the OLED material as a main body material of the luminous layer. The compound structure disclosed by the invention has good bipolar transmission characteristics for electron hole transmission and electron transmission, and has high carrier transmission capability; meanwhile, the glass transition temperature of molecules and the thermolysis temperature can be effectively raised; great benefits are realized on further prolonging of the service life of the device; the prepared device has the advantages that the external quantum efficiency, the power efficiency and the current efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the field of organic electroluminescence, and more particularly relates to an OLED material and a light-emitting device containing the material. Background technique [0002] Electromechanical luminescence has the advantages of ultra-thin, self-illumination, wide viewing angle, fast response, high luminous efficiency, low driving voltage, and low energy consumption. According to the luminescence process in which excitons radiatively transition from the excited singlet state or excited triplet state back to the ground state, electroluminescence is divided into two types: electroluminescence and electrophosphorescence. Constrained by spin statistics, the ratio of singlet and triplet excitons is 1:3 during the formation of excitons. Fluorescent materials can only use the radiative transition from singlet excitons to the ground state due to the triplet exciton spin prohibition, resulting in the internal quantum efficiency of elect...

Claims

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Application Information

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IPC IPC(8): C07F9/6558C07F9/655C07F9/6561C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07F9/65522C07F9/65586C07F9/6561C09K2211/1044C09K2211/1033C09K2211/1029C09K2211/1088H10K85/636H10K85/633H10K85/631H10K85/6574H10K85/657H10K85/6572H10K50/00
Inventor 张成新石宇李庆巨成良刘英瑞王元勋
Owner VALIANT CO LTD
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