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Lighting Object-Based Nondoped-Type White Organic Light-Emitting Diode With N,N'-diphenyl-N,N'-bis(1-naphthyl)-(1,1'-benzidine)-4,4'-diamine as the Chromaticity-Tuning Layer

Lighting Object-Based Nondoped-Type White Organic Light-Emitting Diode With N,N'-diphenyl-N,N'-bis(1-naphthyl)-(1,1'-benzidine)-4,4'-diamine as the Chromaticity-Tuning Layer

Jianzhuo Zhu, Wenlian Li, Zisheng Su, Bei Chu, Liangliang Han, Dongfang Yang, Defeng Bi, Bin Li, Zhizhi Hu, Zhiqiang Zhang, Taiju Tsuboi

Opt Lett. 2007 Dec 15;32(24):3537-9.

PMID: 18087534

Abstract:

We demonstrate a nondoped white organic light-emitting diode in which the blue, green, and red emissions are generated from 4,4(')-bis(2,2(')-diphenylvinyl)-1,1(')-biphenyl, tris(8-hydroxyquinoline)aluminum, and a submonolayer of 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7- tetramethyl-julolidyl 9-enyl)-4H-pyran layers, respectively. A thin layer of N,N(')-diphenyl-N,N(')-bis(1-naphthyl)(1,1(')-benzidine)-4,4(')-diamine (NPB), which differed from the traditional hole-transporting layer, was introduced into the device. The thickness of this thin NPB layer was changed to tune the chromaticity and optimize the white color quality. The white device with a 3 nm chromaticity-tuning NPB layer gives the Commission Internationale de l'Eclairage-1931 xy coordinate of (0.327, 0.336), a color rendering index of 90.2, a maximum luminance of 19,096 cd/m(2), and a maximum current efficiency of 4.12 cd/A. The electroluminescence mechanism of the white device was also discussed.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP138171149	N,N′-Diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine		138171-14-9	Price

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