A new internal field-assisted photocathode based on Ag-O-Cs composite   thin films

doi:10.1016/S0038-1098(02)00190-4

CORC > 北京大学 > 信息科学技术学院

	A new internal field-assisted photocathode based on Ag-O-Cs composite thin films
	Zhang, QF ; Liu, WM ; Xue, ZQ ; Wu, JL
刊名	固体通讯
	2002
关键词	thin films nanoparticles electronic band structure internal field-assisted photemission PHOTOEMISSION OXIDE
DOI	10.1016/S0038-1098(02)00190-4
英文摘要	Internal field-assisted Ag-O-Cs photocathode with sandwich-like structure was successfully fabricated by depositing a silver electrode on the surface of Ag-O-Cs composite thin films that were pre-grown onto a conductive glass substrate. Enhanced photoemission was observed from Ag-O-Cs composite thin films when an internal assistant electric field was applied to the photocathode through the designed sandwich-like structure. The total increase of photoelectronic quantum yield corresponding to the applied 30 V bias was about 15.7% while the photocathode was irradiated by the light with wavelength of 510 nm. Theoretical analysis indicates that such an enhanced photoemission can be attributed to the field-induced variations in the energy-band structure of Ag-O-Cs thin films, including both the decrease of interfacial barrier between the embedded Ag nanoparticles and the CsxO (2 less than or equal to x < 3) semiconductor matrix and the degradation of the vacuum level at the surface. (C) 2002 Elsevier Science Ltd. All rights reserved.; Physics, Condensed Matter; SCI(E); EI; 0; ARTICLE; 9; 515-518; 122
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/210324]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zhang, QF,Liu, WM,Xue, ZQ,et al. A new internal field-assisted photocathode based on Ag-O-Cs composite thin films[J]. 固体通讯,2002.
APA	Zhang, QF,Liu, WM,Xue, ZQ,&Wu, JL.(2002).A new internal field-assisted photocathode based on Ag-O-Cs composite thin films.固体通讯.
MLA	Zhang, QF,et al."A new internal field-assisted photocathode based on Ag-O-Cs composite thin films".固体通讯 (2002).