Organic electroluminescent device based on...

Details Organic electroluminescent device based on... Organic electroluminescent device based on...

2006-11-28

2006-11-28

Yamnitzky, Marie (Department: 1774)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S917000, C313S504000

Reexamination Certificate

active

07141312

ABSTRACT:
The application relates to an organic electroluminescent device which contains 2,5 diaminoterephthalic acid derivatives of formula 1aas emitter substances in one or several emitter layers in a pure or doped manner. The ring A is a triple unsaturated benzene ring wherein R4′and R8′are equal to zero or ring A is a double unsaturated ring respectively provided with a double bond in the 1,2 position and 4,5-position, and wherein R10is a nitrile radical —CN or a radical C(═X1)—X2R1; R11is a nitrile radical —CN or a radical —C(═X3)—X4R5, X1and X3are oxygen, sulphur or imino, X2and X4are oxygen, sulphur or optionally substituted amino, R1to R8, R4′and R8′are H, C1–C20-alkyl, aryl, heteroaryl, R4and R8can also be halogen, nitro, cyanogen or amino, R2to R4, R6–R8, R4′and R8′can also be trifluoromethyl or pentafluorophenyl, wherein certain radicals can form a saturated or unsaturated ring. The novel devices are characterized by narrow emission bands, low driver voltages, high photometric efficiency and high thermal stability within a broad spectral range.

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Machine-assisted translation of JP 10-284250 (Oct. 1998).
Japanese Patent Abstract of 10-294178, Nov. 4, 1998.
Japanese Patent Abstract of 10-284250, Oct. 23, 1998.
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