Sulfur gradient-driven Se diffusion at the CdS/CuIn(S,Se){sub 2} solar cell interface

Journal Article · Mon May 03 00:00:00 EDT 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3425666· OSTI ID:21347418

Weinhardt, L; Morkel, M ^[1]; Baer, M ^[2]; Pookpanratana, S; Heske, C ^[2]; Niesen, T P; Karg, F ^[3]; Ramanathan, K; Contreras, M A; Noufi, R ^[4]; Umbach, E ^[1]

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1. Experimentelle Physik II, Universitaet Wuerzburg, Am Hubland, D-97074 Wuerzburg (Germany)
2. Department of Chemistry, University of Nevada, Las Vegas (UNLV), 4505 Maryland Parkway, Las Vegas, Nevada 89154-4003 (United States)
3. AVANCIS GmbH and Co. KG, Otto-Hahn-Ring 6, 81739 Muenchen (Germany)
4. National Renewable Energy Laboratory (NREL), 1617 Cole Boulevard, Golden, Colorado 80401 (United States)

The diffusion behavior of Se at the CdS/Cu(In,Ga)(S,Se){sub 2} thin film solar cell interface was investigated by x-ray photoelectron spectroscopy and x-ray excited Auger electron spectroscopy. Buffer/absorber structures with S/Se ratios between zero and three at the initial Cu(In,Ga)(S,Se){sub 2} surface were analyzed. Samples from a high-efficiency laboratory process (NREL) as well as from an industrial large-area process (AVANCIS) were investigated. We find selenium diffusion into the CdS buffer layer, the magnitude of which strongly depends on the S content at the absorber surface. The associated modification of the heterojunction partners has significant impact on the electronic structure at the interface.

• OSTI ID: 21347418
• Journal Information: Applied Physics Letters, Vol. 96, Issue 18; Other Information: DOI: 10.1063/1.3425666; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUGER ELECTRON SPECTROSCOPY
CADMIUM SULFIDES
COPPER SELENIDES
COPPER SULFIDES
DIFFUSION
ELECTRONIC STRUCTURE
GALLIUM SELENIDES
GALLIUM SULFIDES
HETEROJUNCTIONS
INDIUM SELENIDES
INDIUM SULFIDES
LAYERS
SELENIUM
SEMICONDUCTOR MATERIALS
SOLAR CELLS
SULFUR
THIN FILMS
X-RAY PHOTOELECTRON SPECTROSCOPY
CADMIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
DIRECT ENERGY CONVERTERS
ELECTRON SPECTROSCOPY
ELEMENTS
EQUIPMENT
FILMS
GALLIUM COMPOUNDS
INDIUM COMPOUNDS
INORGANIC PHOSPHORS
MATERIALS
NONMETALS
PHOSPHORS
PHOTOELECTRIC CELLS
PHOTOELECTRON SPECTROSCOPY
PHOTOVOLTAIC CELLS
SELENIDES
SELENIUM COMPOUNDS
SEMICONDUCTOR JUNCTIONS
SEMIMETALS
SOLAR EQUIPMENT
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS