a Institute of Optoelectronic Technology, Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Beijing 100044, China; b Institute of Physics, Humboldt University, Berlin 12489, Germany
Abstract In the solid state cathodoluminescence (SSCL), organic materials were excited by hot electrons accelerated in silicon oxide (SiO2) layer under alternating current (AC). In this paper exciton behaviours were analysed by using transient spectra under different driving voltages. The threshold voltages of SSCL and exciton ionization were obtained from the transient spectra. The recombination radiation occurred when the driving voltage went beyond the threshold voltage of exciton ionization. From the transient spectrum of two kinds of luminescence (exciton emission and recombination radiation), it was demonstrated that recombination radiation should benefit from the exciton ionization.
Received: 11 September 2006
Revised: 06 November 2006
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of
China (Grant Nos 10374001, 10434030 and 60576016), State Key Development
Program for Basic Research of China (Grant No 2003CB314707), the Excellent
Doctor's Science and Technology Innovation
Cite this article:
Zhang Fu-Jun(张福俊), Zhao Su-Ling(赵谡玲), Xu Zheng(徐征), Huang Jin-Zhao(黄金昭), and Xu Xu-Rong(徐叙瑢) Transient demonstration of exciton behaviours in solid state cathodoluminescence under different driving voltage 2007 Chinese Physics 16 1464
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