Comparison of two methods of improving the characteristics of a double-color white organic light-emitting diode

Xue Chen; Wen-Qing Zhu; Sai Wang; Feng Xu; Hong Xu; Xiao-Wen Zhang; Xi-Feng Li; Xue-Yin Jiang; Zhi-Lin Zhang

doi:10.1117/12.888395

18 February 2011 Comparison of two methods of improving the characteristics of a double-color white organic light-emitting diode

Xue Chen, Wen-Qing Zhu, Sai Wang, Feng Xu, Hong Xu, Xiao-Wen Zhang, Xi-Feng Li, Xue-Yin Jiang, Zhi-Lin Zhang

Author Affiliations +

Proceedings Volume 7995, Seventh International Conference on Thin Film Physics and Applications; 79952F (2011) https://doi.org/10.1117/12.888395
Event: Seventh International Conference on Thin Film Physics and Applications, 2010, Shanghai, China

Abstract

White organic light-emitting diode was realized by co-doping a blue dye p-di(p-N,N-diphenyl-amino-styryl)benzene(DSA-ph) and a red dye 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran(DCJTB) into a blue host 2-(t-butyl)-9,10-di(2-naphthyl)anthracene(TBADN), achieving a brightness of 11580 cd/m² at 200 mA/cm², and a maximum current efficiency of 7.53 cd/A. The improvement was due to efficiency energy transfer from host to guest by the aid of assistant energy transfer mechanism. The device introduced a (4,4'-N,N'-dicarbazole)biphenyl/4,4'-bis(N-carbazolyl)biphenyl(CBP) interlayer between separate double emissive layers with the same materials showed improved color stability, due to the blocking effect of the CBP layer, which contributed to stable and even exciton distribution in both blue and red emission layer.

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Xue Chen, Wen-Qing Zhu, Sai Wang, Feng Xu, Hong Xu, Xiao-Wen Zhang, Xi-Feng Li, Xue-Yin Jiang, and Zhi-Lin Zhang "Comparison of two methods of improving the characteristics of a double-color white organic light-emitting diode", Proc. SPIE 7995, Seventh International Conference on Thin Film Physics and Applications, 79952F (18 February 2011); https://doi.org/10.1117/12.888395

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