ELECTROLUMINESCENCE OF POLYMER DOPED WITH TRIPHENYL-2-PYRAZOLINE
DENG ZHEN-BO (邓振波)ab, S.T.LEE (李述汤)b, CHEN LI-CHUN (陈立春)c, DONG SHU-ZHONG (董树忠)a, SUN HENG-HUI (孙恒慧)a, WANG XUN (王迅)a
a State Key Laboratory of Surface Physics and T .D.Lee Physics Laboratory, Fudan University,Shanghai 200433,China; b Department of Physics and Materials Science, City University of Hong Kong , Hong Kong; c Institute of Material Physics, Tianjin Institute of Technology, Tianjin 300072, China
Abstract Poly-phenylquinoxaline is used as the electroluminescent( EL) materials to fabricate the thin film electroluminescent devices by the spin coating method. Doped with 1,3,5-triphenyl-2-pyrazoline,the EL spectrum of the devices is shifted to the blue-green region with its peak located at 465nm. The incorporation of a hole transport layer,poly-vinylcarbazole,will enhance the EL intensity,and the quantum efficiency is estimated to be 0.2%. Thus,the devices can be driven by either positive or negative bias(or ac voltage) even though the currentvoltage curve possesses a rectifying property.
Received: 28 January 1997
Accepted manuscript online:
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