Published November 7, 2014
| Version v1
Journal article
Low energy electron microscopy and Auger electron spectroscopy studies of Cs-O activation layer on p-type GaAs photocathode
Creators
- 1. Institute for Advanced Research, Nagoya University, Nagoya 4648603 (Japan)
- 2. Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901 (Brazil)
- 3. NCEM, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- 4. Nagoya University Synchrotron Radiation Research Center, Nagoya 4648603 (Japan)
Description
Work function, photoemission yield, and Auger electron spectra were measured on (001) p-type GaAs during negative electron affinity (NEA) surface preparation, surface degradation, and heating processes. The emission current sensitively depends on work function change and its dependence allows us to determine that the shape of the vacuum barrier was close to double triangular. Regarding the NEA surface degradation during photoemission, we discuss the importance of residual gas components the oxygen and hydrogen. We also found that gentle annealing (≤100 °C) of aged photocathodes results in a lower work function and may offer a patch to reverse the performance degradation
Additional details
Identifiers
- DOI
- 10.1063/1.4901201;
Publishing Information
- Journal Title
- Journal of Applied Physics
- Journal Volume
- 116
- Journal Issue
- 17
- Journal Page Range
- p. 174509-174509.6
- ISSN
- 0021-8979
- CODEN
- JAPIAU
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 46108361
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- ANNEALING; AUGER ELECTRON SPECTROSCOPY; ELECTRON MICROSCOPY; GALLIUM ARSENIDES; HYDROGEN; LAYERS; NEA; OXYGEN; PHOTOCATHODES; PHOTOEMISSION; SHAPE; SURFACES; WORK FUNCTIONS
- Descriptors DEC
- ARSENIC COMPOUNDS; ARSENIDES; CATHODES; ELECTRODES; ELECTRON SPECTROSCOPY; ELEMENTS; EMISSION; FUNCTIONS; GALLIUM COMPOUNDS; HEAT TREATMENTS; INTERNATIONAL ORGANIZATIONS; MICROSCOPY; NONMETALS; OECD; PNICTIDES; SECONDARY EMISSION; SPECTROSCOPY
Optional Information
- Notes
- (c) 2014 AIP Publishing LLC