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Photoluminescence and Electroluminescence of the Blue Emission of Devices Based on Poly (p-Phenylenevinylene) Copolymers |
MA Dong-ge;HONG Zhi-yong;ZHAO Xiao-jiang;JING Xia-bin;WANG Fo-song;SHI Jia-wei1;LIU Ming-da1;JIN En-shun1;LI Shu-wen1 |
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
1Department of Electronics Engineering, Jilin University, Changchun 130023 |
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Cite this article: |
MA Dong-ge, HONG Zhi-yong, ZHAO Xiao-jiang et al 1996 Chin. Phys. Lett. 13 940-943 |
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Abstract Bright blue polymer light-emitting diodes have been fabricated by using the poly(pphenylenevinylene)-based copolymers with 10 C long aliphatic chains as the electroluminescent layers, PBD in PMMA and Alq3 as the electron-transporting layers, and aluminum as the cathode. The multilayer structure devices show 190cd/m2 light-emitting brightness at 460nm, 15 V turn-on vol- tage. It is found that the intensities of photoluminescence and electroluminescence (EL) increase with increasing aliphatic chain length, the EL intensity and operation stability of these polymer light-emitting diodes can be improved by reasonable design of the structure.
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Keywords:
78.60.Fi
78.66.Qn
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Published: 01 December 1996
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