A multiple-selenization process for enhanced reproducibility of Cu2ZnSn(S,Se)4 solar cells

A multiple-selenization process for wet-chemically fabricated kesterite-type Cu2ZnSn(S,Se)4 solar cells is reported that significantly improves the overall sample quality of the absorber layer and especially the reproducibility of device characteristics. Conversion efficiencies of up to 7.2% are obt...

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Veröffentlicht in:Applied physics letters 2016-12, Vol.109 (23)
Hauptverfasser: Neuwirth, Markus, Zhou, Huijuan, Schnabel, Thomas, Ahlswede, Erik, Kalt, Heinz, Hetterich, Michael
Format: Artikel
Sprache:eng
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Zusammenfassung:A multiple-selenization process for wet-chemically fabricated kesterite-type Cu2ZnSn(S,Se)4 solar cells is reported that significantly improves the overall sample quality of the absorber layer and especially the reproducibility of device characteristics. Conversion efficiencies of up to 7.2% are obtained. With this method, the absorber forms a very compact, hole- and crack-free layer and avoids the formation of multilayer or trilayer structures. Mainly, the series resistance and therefore the short-circuit current can be stabilized, which leads to lower fluctuation of the energy conversion efficiency of the solar cells on the same sample.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4971362