Organic electroluminescent device based on...

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

2006-09-26

2006-09-26

Yamnitzky, Marie (Department: 1774)

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen in the nitrogen containing substituent

C544S089000, C544S095000, C544S096000, C544S250000, C544S251000, C544S296000, C544S298000, C544S319000, C428S917000, C313S504000

Reexamination Certificate

active

07112674

ABSTRACT:
The invention relates to an organic electroluminescent device which contains 2,5-diaminoterephthalic acid derivatives of formula 1a as 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 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, sulfur or imino, X2and X4are oxygen, sulfur or optionally substituted amino, R1–R8, R4′and R8′are H, C1–20-alkyl, aryl, heteroaryl, R4and R8can be halogen, nitro, cyanogen or amino, R2–R4, R6–R8, R4′and R8′can be trifluoromethyl or pentafluorophenyl, and wherein certain radicals can form a saturated or unsaturated ring. The 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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