Intergrain variations of the chemical and electronic surface structure of polycrystalline Cu(In,Ga)Se2 thin-film solar cell absorbers
- The μm-scale spatial distribution of the elements of polycrystalline Cu(In1− x Ga x )Se2 absorber surfaces is examined using x-ray photoelectron emission microscopy. The chemical composition varies from grain to grain, and a direct, linear anticorrelation between the In 3d and Ga 2p photoemission line intensities is observed. The line intensities are interpreted in terms of a varying value of x= Ga/(In+ Ga); the band gaps calculated from the inferred compositions of the grains are shown to be normally distributed with a standard deviation of 40 meV.
Author: | Regan G. Wilks, Ingrid Repins, M. A. Contreras, Roberto Felix Duarte, J. Herrero-Albillos, L. Tati-Bismaths, F. Kronast, R. Noufi, Marcus Bär |
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ISSN: | 0003-6951 |
Title of the source (English): | Applied Physics Letters |
Document Type: | Scientific journal article peer-reviewed |
Language: | English |
Year of publication: | 2012 |
Volume/Year: | 101 |
Issue number: | 10 |
First Page: | 103908-1 |
Last Page: | 103908-4 |
Faculty/Chair: | Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / JP Photovoltaik |
Institution name at the time of publication: | Fakultät für Mathematik, Naturwissenschaften und Informatik (eBTU) / JP Photovoltaik |