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Investigating sputtered Cu2Si1−xSnxS3 [CSTS] for earth abundant thin film photovoltaics

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4 Author(s)
Elizabeth A. Lund ; Department of Chemical Engineering, University of Utah, Salt Lake City, USA ; Jeffrey L. Johnson ; Win Maw Hlaing Oo ; Michael A. Scarpulla

This study investigates the synthesis of chalcopyrite Cu2Si1-xSnxS3 (CSTS) thin films for photovoltaic solar cell absorber layers. Preliminary results indicate that layered sputtering of Cu, Sn, and Si followed by annealing in a sulfur atmosphere at 500°C does not provide adequate mixing or sulfur incorporation. Annealing/sulfurizing a homogeneous co-sputtered film of Cu, Sn, and S lead to CSTS formation, although low sulfur incorporation and undesired copper sulfide phase formation resolved. Sputtering from sulfide targets may lead to formation of CSTS.

Published in:

Photovoltaic Specialists Conference (PVSC), 2010 35th IEEE

Date of Conference:

20-25 June 2010