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Chinese Physics, 2007, Vol. 16(5): 1464-1466    DOI: 10.1088/1009-1963/16/5/049
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Transient demonstration of exciton behaviours in solid state cathodoluminescence under different driving voltage

Zhang Fu-Jun(张福俊)a)b)†, Zhao Su-Ling(赵谡玲)a), Xu Zheng(徐征)a)‡, Huang Jin-Zhao(黄金昭)a), and Xu Xu-Rong(徐叙瑢)a)
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.
Keywords:  electroluminescence      ionization  
Received:  11 September 2006      Revised:  06 November 2006      Accepted manuscript online: 
PACS:  78.60.Hk (Cathodoluminescence, ionoluminescence)  
  71.35.-y (Excitons and related phenomena)  
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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