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DOI: 10.1039/A906215G (Paper) Reference Section for: J. Mater. Chem., 1999, 9, 3023-3026

Bright red light-emitting organic electroluminescent devices based on a novel thiophene-containing europium complex as an emitting layer

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Keizou Okada, Yan-Feng Wang, Tian-Ming Chen, Masaya Kitamura, Tadao Nakaya and Hideo Inoue

Abstract

A novel europium complex, Eu(DTP)3(dipphen) (DTP = 1,3-di(2-thienyl)propane-1,3-dione, dipphen = 4,7-diphenyl-1,10-phenanthroline), has been synthesized and applied to organic electroluminescent (EL) devices as an emitting and electron-transporting material. The EL device structure can be described as indium tin oxide (ITO)/hole-transporting layer (triphenyldiamine derivative (TPD))/emitting layer (Eu(DTP)3(dipphen))/electron transport layer (Alq3)/AlLi (99∶1). The emitting layers were formed by a codeposition technique. The deposited EL devices were observed to emit a bright red light originating from Eu(DTP)3(dipphen) with a maximum luminance of 450 cd m–2 at 15 V and 200 mA cm–2.

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