物理学报2011，Vol.60Issue(1)：726-731,6.
反射式NEA GaN光电阴极量子效率恢复研究
Quantum efficiency recovery of reflection-mode NEA GaN photocathode
摘要
Abstract
In order to investigate the decay tendency and the recovery status of the quantum efficiency of reflection-mode NEA GaN photocathode, the quantum efficiency curves have been studied after the photocathode was fully activated, stored in system and supplemented with Cs.The quantum efficiency decay and recovery processes of reflection-mode NEA GaN photocathode were observed and the mechanism was discussed.The quantum efficiency value of reflection-mode NEA GaN photocathode can be recovered up to more than 94％ of the best value in the shortwave region between 240nm and 300nm,and more than 88％ in the long wave region between 300nm and 375nm after Cs supplement.Based on the changes of surface potential barrier profiles of the reflection-mode NEA GaN photocathode before and after the quantum efficiency degradation and the quantum yield formula, the decay characteristic and the recovery status of quantum efficiency curve after supplement with Cs have been related to the changes of surface barrier shapes.关键词
反射式/NEA/GaN光电阴极/量子效率Key words
reflection-mode/ NEA/ GaN photocathode/ quantum efficiency引用本文复制引用
乔建良,常本康,钱芸生,杜晓晴,王晓晖,郭向阳..反射式NEA GaN光电阴极量子效率恢复研究[J].物理学报,2011,60(1):726-731,6.基金项目
国家自然科学基金(批准号:60871012,60701013)和河南省教育厅自然科学研究计划项目(批准号:2010C510009)资助的课题. （批准号:60871012,60701013）
