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Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu2ZnSnS4 thin-film solar cell heterojunction

  • The electronic structure of the CdS/Cu2ZnSnS4 (CZTS) heterojunction was investigated by direct and inverse photoemission. The effects of a KCN etch of the CZTS absorber prior to CdS deposition on the band alignment at the respective interface were studied. We find a “cliff”-like conduction band offset at the CdS/CZTS interface independent of absorber pretreatment and a significant etch-induced enhancement of the energetic barrier for charge carrier recombination across the CdS/CZTS interface.

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Author: Marcus Bär, Björn-Arvid Schubert, Björn Marsen, Regan G. Wilks, Sujitra Pookpanratana, Monika Blum, Stefan Krause, Thomas Unold, Wan Li Yang, Lothar Weinhardt, Clemens Heske, Hans-Werner Schock
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2011
Tag:energy band alignment; kesterite; thin-film solar cells
Quelle aus UBICO:Applied physics letters 99(2011)222105, 0003-6951
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
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