Compound for phosphorescent host material and application thereof

A phosphorescent host and compound technology, applied in the compound field of phosphorescent host materials, can solve the problems of reduced usage, poor thermal stability, short lifespan of organic light-emitting devices, etc. and chemical stability

Pending Publication Date: 2022-04-08
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The glass transition temperature Tg of this type of material is generally low and the thermal stability is poor, resulting in a short lifetime of organic light-emitting devices using phosphorescent materials, thus reducing the use of such materials

Method used

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  • Compound for phosphorescent host material and application thereof
  • Compound for phosphorescent host material and application thereof
  • Compound for phosphorescent host material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027]

[0028] Synthesis of Intermediate A1

[0029] In a 500mL one-necked flask, add 0.1mol of 5-bromoindole, 0.2mol of pinacol diborate, 0.2mol of potassium acetate, 1.50g of [1,1'-bis(diphenylphosphino) ) ferrocene] palladium dichloride, 350mL of dioxane, refluxed for 8h under nitrogen protection; after cooling, spin evaporated to remove dioxane, washed with 200mL of distilled water and extracted 3 times with dichloromethane; - Recrystallization from dichloromethane gave 21.8 g of intermediate A1 with a yield of 90%.

[0030] Synthesis of Intermediate A2

[0031] In a 50mL one-necked flask, add 10mmol of intermediate A1, 11mmol of 9-phenyl-9-(4-bromophenyl)fluorene, 20mmol of potassium carbonate, 50mg of tetrakistriphenylphosphopalladium, 20mL of Oxyhexane and 4.0mL of water were refluxed for 5h under the protection of nitrogen; after cooling, the dioxane was removed by rotary evaporation, washed with 20mL of distilled water and extracted three times with dichlorometh...

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Abstract

The invention relates to a compound for a phosphorescent host material. The structure of the compound is shown as a formula (I). Wherein Ar1 and Ar2 are respectively and independently selected from phenyl, biphenyl or naphthyl. According to the indole group-containing phosphorescent host compound provided by the invention, through a structure that benzoindole is connected with triazine, the triplet state energy level of a molecule is improved, and meanwhile, an exciton recombination region can be effectively widened, so that excitons are uniformly distributed, and recombination of carriers at an interface is avoided; the triplet state-triplet state quenching of excitons at high concentration is reduced, so that an excellent phosphorescent host material with a relatively high triplet state and a relatively wide energy gap is obtained; the compound provided by the invention has a good application effect in OLED devices, and has a better industrialization prospect.

Description

technical field [0001] The invention relates to the field of organic electroluminescence, in particular to a compound used for phosphorescence host material and application thereof. Background technique [0002] Organic electroluminescence (OLED, Organic Light Emission Diodes) device technology has the advantages of thinness, self-luminescence, wide viewing angle, low energy consumption, high efficiency, rich colors, fast response speed, wide application temperature, low driving voltage, flexible and bendable and It has unique advantages such as transparent display panels and environmental friendliness, and has a wide range of application prospects. Generally composed of two opposing electrodes and at least one layer of organic light-emitting compound interposed between the two electrodes, charges are injected into the organic layer formed between the anode and cathode to form electron and hole pairs, Causes light emission from organic compounds with fluorescent or phosphor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D403/14H01L51/54H01L51/50
Inventor 田帅孙加宝
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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