Regensburg 2016 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 90: Poster III

HL 90.2: Poster

Thursday, March 10, 2016, 16:00–19:00, Poster A

Improved Selenization Process of Wet-Chemically Fabricated Cu2ZnSn(S,Se)4 Absorbers for Thin-Film Solar Cells — •Markus Neuwirth¹, Huijuan Zhou¹, Mario Lang¹, Niklas Mathes¹, Thomas Schnabel², Erik Ahlswede², Michael Powalla^2,3, Heinz Kalt¹, and Michael Hetterich¹ — ¹Institute of Applied Physics, Karlsruher Institut für Technologie (KIT), 76131 Karlsruhe — ²Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), 70565 Stuttgart — ³Light Technology Institute, Karlsruher Institut für Technologie (KIT), 76131 Karlsruhe

Solar cells based on Cu2ZnSn(S,Se)4 (CZTSSe) are promising since they only comprise environmentally friendly and earth-abundant elements. However, their conversion efficiency is still too low to be competitive and especially good reproducibility of high-efficiency devices is a major issue. Our fabrication approach for CZTSSe consists of a cheap and simple solution-based process that spares toxic solvents such as hydrazine. Optimizing the selenization process of the doctor-bladed precursors led to a significantly improved reproducibility and energy conversion efficiencies of up to 7