Regensburg 2016 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 90: Poster III

HL 90.8: Poster

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

Wet-Chemical Processing of CdS and Alternative Buffer Layers for Cu₂ZnSn(S,Se)₄ Solar Cells . — •Lwitiko Mwakyusa¹, Markus Neuwirth¹, Niklas Mathes¹, Mario Lang¹, Thomas Schnabel², Erik Ahlswede², Michael Powalla^2,3, Bryce Richards^3,4, Heinz Kalt¹, and Michael Hetterich¹ — ¹Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — ²Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), 70565 Stuttgart, Germany — ³Light Technology Institute, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — ⁴Institute of Microstructure Technology, Karlsruhe Institute of Technology (KIT), 76344 Karlsruhe, Germany

Solar cells based on Cu₂ZnSn(S,Se)₄ (CZTSSe) are promising since they only comprise environmentally friendly and earth-abundant elements. However, their device architecture which has been adopted from Cu(In,Ga)Se₂ (CIGS) is not yet optimal. This holds in particular for the CdS buffer. In this contribution we study the fabrication of alternative buffer layers, especially that of (Cd,Zn)S and their impact on the performance of CZTSSe solar cells.