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Browse Journals & Magazines > Applied Physics Letters ...> Volume:99 Issue:15 Help

Impact of KCN etching on the chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers

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9 Author(s)
Bar, M. ; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Hahn-Meitner-Platz 1, D-14109 Berlin, Germany ; Schubert, B.-A. ; Marsen, B. ; Krause, S.
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The chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers has been investigated by direct and inverse photoemission. Particular emphasis was placed on the impact of KCN etching, which significantly alters the surface composition and is best explained by a preferred etching of Cu and, to a lesser degree, Sn. As a consequence the surface band gap increased from (1.53 ± 0.15) eV, which agrees with optically derived bulk band gap values, to (1.91 ± 0.15) eV.

Published in:
Applied Physics Letters  (Volume:99 ,  Issue: 15 )

Date of Publication: Oct 2011

Page(s):
152111 - 152111-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.3650717
Product Type:
Journals & Magazines
Date of Current Version :
12 December 2011
Issue Date :
Oct 2011

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