Organic compound and organic light emitting diode

An organic compound, light-emitting diode technology, applied in the field of organic functional materials, to achieve the effects of low efficiency, roll-off effect, and high luminous efficiency

Inactive Publication Date: 2020-08-04
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the materials used in OLED are generally fluorescent materials or phosphorescent materials. Existing fluorescent materials can only use singlet excitons, and their theoretical maximum internal quantum efficiency is 25%. Phosphorescent materials can use singlet and triplet excitons at the same time. Its theoretical maximum internal quantum efficiency can reach 100%, but it needs to use rare and precious metals

Method used

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  • Organic compound and organic light emitting diode
  • Organic compound and organic light emitting diode
  • Organic compound and organic light emitting diode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: Preparation (I-1) of intermediate electron acceptor (A):

[0054]

[0055] In a nitrogen atmosphere, put 2g (5.25mmol) of 1,3-bis(4-bromophenyl)-3-hydroxyprop-2-en-1-one into a two-neck round bottom flask, add 100mL of dichloromethane to dissolve , Add 0.75g (5.25mmol) boron trifluoride ether with a syringe, heat to 60°C and reflux for 2h. Cool to room temperature, filter and spin dry. Recrystallized in acetone:n-hexane to obtain 1.76 g of solid, with a yield of 71%. 1H NMR 8.01 (d, 2H), 7.79 (d, 2H), 7.62 (s, 1H) 7.55 (d, 2H), 7.27 (d, 2H); MS (EA): m / e 427.9 (M+).

Embodiment 2

[0056] Embodiment 2: the preparation of organic compound 1

[0057]

[0058] Add 1.4 g of intermediate (I-1), 1.3 phenoxazine, 0.08 g of palladium acetate, 0.3 g of tri-tert-butylphosphine tetrafluoroborate, 0.7 g of sodium tert-butoxide and 30 mL of anhydrous toluene into a two-necked flask, After refluxing for 48h under the protection of nitrogen, it was cooled to room temperature, added dichloromethane to filter, and spin-dried. Pass through the column with petroleum ether:dichloromethane at a volume ratio of 1:2 to obtain 1.45 g of a brown-red product. Yield 71%. 1HNMR 7.64(d,2H),7.62(s,1H),7.13(d,2H),6.92-6.89(m,8H),6.82(d,2H),6.77(m,4H),6.59-6.58(m , 6H); MS (EA): m / e 664.4 (M+).

Embodiment 3

[0059] Embodiment 3: the preparation of organic compound 2

[0060]

[0061] Add the formula 1.3g intermediate (I-1), 1.3 phenothiazine, 0.08g palladium acetate, 0.3g tri-tert-butylphosphine tetrafluoroborate, 0.7g sodium tert-butoxide and 30mL anhydrous toluene into a two-necked flask , Refluxed for 48h under the protection of nitrogen, cooled to room temperature, added dichloromethane to filter, and spin-dried. Pass through the column with petroleum ether:dichloromethane at a volume ratio of 1:1 to obtain 1.21 g of a brown-red product. Yield 63%. 1 HNMR 7.64(d,2H),7.62(s,1H),7.21-7.16(m,12H),7.13(d,2H),6.97(m,4H),6.82(d,2H),6.58(d,2H ); MS (EA): m / e 696.2 (M+).

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Abstract

The invention relates to an organic compound and an organic light emitting diode. The organic compound has a structure as shown in a formula (I) (See the specification for reference). The organic compound can adjust the molecular energy band system and the light-emitting color, and the organic light-emitting diode prepared by taking the organic compound as a thermal activation delayed fluorescencematerial has the characteristics of high light-emitting efficiency and low-efficiency roll-off effect.

Description

technical field [0001] The invention relates to the field of organic functional materials, in particular to organic compounds and organic light-emitting diodes. Background technique [0002] Organic Light-Emitting Diode (OLED) has attracted much attention due to its high efficiency, wide color gamut, low energy consumption, and rollability, especially in the fields of display and lighting. At present, the materials used in OLEDs are generally fluorescent materials or phosphorescent materials. Existing fluorescent materials can only use singlet excitons, and their theoretical maximum internal quantum efficiency is 25%. Phosphorescent materials can use singlet and triplet excitons at the same time. Its theoretical maximum internal quantum efficiency can reach 100%, but it requires the use of rare and precious metals. [0003] In recent years, thermally activated delayed fluorescence materials (TADF materials) have received widespread attention, because their theoretical maxim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/50H01L51/54
CPCC07F5/022C09K11/06C09K2211/1029C09K2211/1033C09K2211/1037C09K2211/1007C09K2211/1096H10K85/657H10K85/6572H10K85/322H10K50/00
Inventor 胡佳罗健
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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