物理学报2011，Vol.60Issue(5)：745-751,7.
反射式负电子亲和势GaN光电阴极的光电发射及稳定性研究
Photoemission stability of negative electron affinity GaN phtocathode
摘要
Abstract
The spectral response and quantum yield curve of reflection mode GaN photocathode just after Cs, O activation and Cs reactivation was achieved by using the online multi-information measurement and evaluation system.Also the attenuation in photocurrent under the radiation of 300 nm light is measured every hour.The result indicates that GaN photcathdoe are much more stable than narrow band material.The photocurrent peak increased by 16.8％ after Cs reactivation which demonstrates the reason of the QE attenuation is the Cs desorption on the Cs, O adlayer of surface.This can be explained by a double dipole layer model [GaN (Mg): Cs]Cs-O whose stability determines the stability of GaN photocathode.关键词
光学/光电阴极/量子效率/稳定性Key words
optics/ photocathode/ quantum efficiency/ stability引用本文复制引用
郭向阳,常本康,王晓晖,张益军,杨铭..反射式负电子亲和势GaN光电阴极的光电发射及稳定性研究[J].物理学报,2011,60(5):745-751,7.基金项目
国家自然科学基金(批准号:60871012,60701013)资助的课题. （批准号:60871012,60701013）
