Evaluating Acceleration Ability of Electrons of Different Acceleration Layers in Solid State Cathodoluminescence
LI Jun-ming, XU Zheng*, ZHAO Su-ling, ZHANG Fu-jun, SONG Dan-dan, LIU Xiao-dong, SONG Jing-lu, XU Xu-rong, WANG Yong-sheng
Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education and Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, China
Abstract：Solid state cathodoluminescence is a brand-new excitation mode. In the device, electron acceleration layer plays a very important role in obtaining high energy hot electrons to excite organic luminescent materials in solid state cathodoluminescence. Two kinds of structural devices (A：ITO/MEH-PPV/SiO2/Al, B：ITO/MEH-PPV/ZnO/Al) were fabricated. The theoretical calculation and analysis show that the tunnel current and electric field was higher in SiO2 layer than that in ZnO layer under the same applied driving voltage. The experimental results show that the intensity of device A with SiO2 as electrons acceleration layer is stronger than that of device B with ZnO as electrons acceleration layer under the same driving voltage. And the result demonstrated that electrons in the conduction band of SiO2 can be heated to higher energy than that in ZnO.
Key words：Solid state cathodoluminescence;Electrons acceleration;Hot electron
厉军明，徐 征*，赵谡玲，张福俊，宋丹丹，刘晓东，宋晶路，徐叙瑢，王永生. 不同加速层材料对固态阴极射线发光的影响[J]. 光谱学与光谱分析, 2009, 29(11): 2893-2896.
LI Jun-ming, XU Zheng*, ZHAO Su-ling, ZHANG Fu-jun, SONG Dan-dan, LIU Xiao-dong, SONG Jing-lu, XU Xu-rong, WANG Yong-sheng. Evaluating Acceleration Ability of Electrons of Different Acceleration Layers in Solid State Cathodoluminescence. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(11): 2893-2896.
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