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Materials for electroluminescent devices

A technique of electroluminescence and emission layer, applied in the field of efficiently preparing these materials, materials containing borazane

Active Publication Date: 2007-02-07
VERSITECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one of the limiting factors in reducing driving voltage and increasing efficiency is charge transport [L.S.Hung et al., Mater.Sci.Eng.R. 39 :143 (2002)]

Method used

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  • Materials for electroluminescent devices
  • Materials for electroluminescent devices
  • Materials for electroluminescent devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] The preparation of embodiment 1-compound 2

[0115] Freshly distilled aniline (5 g, 0.055 mol) was introduced under argon into a round bottom flask containing borane triethylamine compound (9 mL, 0.061 mol). The mixture was heated to 80°C for a total of 16 hours and then further heated to 180°C. Excess reactants were then removed under vacuum. The reaction mixture was cooled to room temperature to collect the product, which was then purified by high vacuum sublimation. A white solid was obtained (3 g, 53% yield).

[0116] 1 H NMR (300MHz, CDCl 3 )δ7.35 (t, J=6.90Hz, 6H), 7.25-7.18 (m, 9H), 5.00 (bs, 3H) (Note: t=triplet, m=multiplet, b=broad, s= Unimodal). 13 C NMR (75MHz, CDCl 3 ,) δ148.0, 128.8, 125.2, 124.7. FAB-MS (m / z): 309 [M + ]. Melting point 167°C (DSC). T g : 121°C. T d : 203°C.

Embodiment 2

[0117] The preparation of embodiment 2-compound 3

[0118] Freshly distilled acetonitrile (2 g, 0.048 mol) was introduced under argon into the round bottom flask containing calcium chloride dried chlorobenzene. Bubbles of boron trichloride were then continuously bubbled through the solution until smoke was observed on the neck of the bottle, indicating that all the acetonitrile had been consumed. Dry powdered ammonium chloride (2.8 g) was added and the reaction mixture was heated at reflux for 3 hours. The reaction mixture was cooled to room temperature and the chlorobenzene was removed by cannula. Next, 150 ml of benzene was introduced into the reaction mass, and then a solution of 15 g (0.088 mol) of diphenylamine in 100 ml of benzene was added dropwise to the reaction mixture. The reaction mixture was refluxed for an additional 16 hours. The white product (4.5 g, 48% yield) was collected by filtration and purified by high vacuum sublimation. FAB-MS (m / z): 582[M + ]. E...

Embodiment 3

[0121] * = not measured

[0122] n.o. = not observed

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Abstract

Materials containing one or more borazine rings are employed as materials for electroluminescent devices. The compounds have molecular structures represented by the following formula: in which R1-R6 are independently a metal; a whole or part of an optionally substituted borazine ring; hydrogen; halogen; hydroxyl; optionally substituted alkyl, cycloalkyl, aryl, acyl, alkoxy, acyloxy, amino, acylamino, aralkyl, cyano, carboxyl, thio, vinyl, styryl, aminocarbonyl, carbamoyl, aryloxycarbonyl, phenoxycarbonyl, or alkoxycarbonyl, as well as recognized donor and acceptor groups. The compounds have high thermal stability as well as hole and electron mobilities.

Description

technical field [0001] The present invention relates to new electroluminescence (EL) devices, including organic and polymer light emitting devices (OLEDs and PLEDs), which emit light in the ultraviolet or visible region. More specifically, the present invention relates to the use of borazine-containing materials in one or more layers of EL devices OLEDs and PLEDs. These layers include hole injection layers, hole transport layers, electron injection layers, electron transport layers, emissive layers containing single emitters or hosts with one or more emissive dopants, hole blocking layers and / or electron blocking layers. layers, etc., but not limited to these instances. Use of the above materials in EL devices can improve device performance, including, but not limited to, achieving purer colors, higher efficiencies, and lower drive voltages. Further, the present invention also relates to methods for efficiently preparing these materials. Background technique [0002] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H05B33/20C07F5/02C07F5/05H05B33/14
CPCC07F5/022C09K11/06Y10S428/917H05B33/14C09K2211/1085
Inventor 支志明岑晓彤
Owner VERSITECH LTD
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