Electroplex emission at PVK/Bphen interface for application in white organic light-emitting diodes |
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Authors: | Liang Wen Jiangxing Xie Yong Zheng Sheng Xu Bo Qu Qihuang Gong |
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Institution: | a Institute of Optoelectronic Display, School of Physics and Information Engineering, Fuzhou University, Fuzhou 350002, People's Republic of China b State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, People's Republic of China |
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Abstract: | White organic light-emitting diode (WOLED) with a structure of ITO/poly(N-vinylcarbazole) (PVK)/4,7-diphenyl-1, 10-phenanthroline (Bphen)/tris(8-hydroxyquinoline)aluminum (Alq3)/LiF/Al has been fabricated via the thermal evaporation technique. The electroluminescence (EL) spectrum of the as-fabricated WOLED covers from 380 to 700 nm of the visible light region with a wide blue emission from PVK and an interesting new red emission. The red emission at 613 nm in EL spectra of the WOLED was attributed to electroplex emission at PVK/Bphen interface since it was not observed in photoluminescence spectra. The WOLED showed a Commission International De l'Eclairage coordinate of (0.31, 0.32), which is very close to the standard white coordinate (0.33, 0.33). |
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Keywords: | WOLED Electroplex emission CIE coordinate EL spectra |
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