Published December 8, 2008
| Version v1
Journal article
The chemical and electronic surface and interface structure of CuGaSe2 thin-film solar cell absorbers
Creators
- 1. Solarenergieforschung (SE2), Helmholtz-Zentrum Berlin fuer Materialien und Energie, Lise-Meitner Campus, Glienicker Str. 100, D-14109 Berlin (Germany)
- 2. Department of Chemistry, University of Nevada, Las Vegas, 4505 Maryland Parkway, Box 454003, Las Vegas, Nevada 89154-4003 (United States)
Description
The chemical and electronic surface and interface structure of CuGaSe2 thin films was investigated by photoelectron spectroscopy. With bulk [Ga]/[Cu] ratios increasing from 0.94 to 1.39 a transition of the Cu:Ga:Se surface composition from 1:1:2 to 1:3:5 and a downward shift of the valence band maximum with respect to the Fermi energy were observed. The comparison with the conduction band minimum (CBM) of CdS reveals that at the CdS/CuGaSe2 interface the recombination barrier height simultaneously increases and a 'clifflike' offset is formed to the CBM of CuGaSe2
Additional details
Identifiers
- DOI
- 10.1063/1.2998391;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 93
- Journal Issue
- 23
- Journal Page Range
- p. 232104-232104.3
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40051184
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CADMIUM SULFIDES; COPPER ALLOYS; FERMI LEVEL; GALLIUM ALLOYS; RECOMBINATION; SELENIUM ALLOYS; SEMICONDUCTOR MATERIALS; SOLAR CELLS; SURFACE PROPERTIES; TERNARY ALLOY SYSTEMS; THIN FILMS; ULTRAVIOLET RADIATION; X-RAY PHOTOELECTRON SPECTROSCOPY
- Descriptors DEC
- ALLOY SYSTEMS; ALLOYS; CADMIUM COMPOUNDS; CHALCOGENIDES; DIRECT ENERGY CONVERTERS; ELECTROMAGNETIC RADIATION; ELECTRON SPECTROSCOPY; ENERGY LEVELS; EQUIPMENT; FILMS; INORGANIC PHOSPHORS; MATERIALS; PHOSPHORS; PHOTOELECTRIC CELLS; PHOTOELECTRON SPECTROSCOPY; PHOTOVOLTAIC CELLS; RADIATIONS; SOLAR EQUIPMENT; SPECTROSCOPY; SULFIDES; SULFUR COMPOUNDS; TRANSITION ELEMENT ALLOYS
Optional Information
- Notes
- (c) 2008 American Institute of Physics