14 November 2007 Study on the performance of organic light-emitting diode with N,N'-bis(3-methylphenyl)-N,N'-diphenylbenzidine doped in polystyrene as hole transporting layer
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Proceedings Volume 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 67223P (2007) https://doi.org/10.1117/12.783538
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China
Abstract
Organic light-emitting diodes (OLEDs) with a structure of indium-tin-oxide(ITO)/N,N'-bis(3-methyl¬phenyl)-N,N'-diphenylbenzidine(TPD):polystyrene(PS)/tris(8-hydroxyquinoline)-aluminum(Alq3)/Mg:Ag were fabricated. Among them PS:TPD thin film acts as a hole transporting layer (HTL) and was prepared via dimethylbenzene solution dissolved with a mixture of PS:TPD by spin-coating method. The influence of TPD doped ratio in the mixture on the performance of device was investigated. Experimental results show that luminescent brightness of devices increase with the enhancement of TPD doped ratio, while electroluminescent spectra are not affected. In addition, lifetime of the device when the ratio of TPD to PS is 7:3 was 4 times higher than that of pure-TPD device. This phenomenon was postulated that PS enhanced the uniformity of TPD film, which was characterized by the result of atomic force microscope (AFM) analysis, and thus overcame the shortcoming of low stability of small-molecular film.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jing Deng, Jing Deng, Guangzhong Xie, Guangzhong Xie, Junsheng Yu, Junsheng Yu, Fan Suo, Fan Suo, Weizhi Li, Weizhi Li, Yadong Jiang, Yadong Jiang, } "Study on the performance of organic light-emitting diode with N,N'-bis(3-methylphenyl)-N,N'-diphenylbenzidine doped in polystyrene as hole transporting layer", Proc. SPIE 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 67223P (14 November 2007); doi: 10.1117/12.783538; https://doi.org/10.1117/12.783538
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