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Regensburg 2013 – scientific programme

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DS: Fachverband Dünne Schichten

DS 32: Poster Session IV: Atomic layer deposition; Organic thin films; Organic Electronics and Phototovoltaics; Organic Materials for Spintronics - from spinterface to devices; Thin film photovoltaic materials and solar cells

DS 32.50: Poster

Thursday, March 14, 2013, 17:00–20:00, Poster B2

preparation of Cu2ZnSn(S,Se)4 thin films and solar cells by chemical bath deposition — •chao gao1, thomas schnabel2, erik ahlswede2, michael powalla2,3, heinz kalt1, and michael hetterich11Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany — 2Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), 70565 Stuttgart, Germany — 3Light Technology Institute (LTI), Karlsruhe Institute of Technology (KIT)

Cu2ZnSn(S,Se)4 (CZTSSe) is a promising absorber material for thin-film solar cells. It has the suitable optical band-gap for photovoltaic energy conversion, a high optical absorption coefficient, and all its constituent elements are abundant and non-toxic. Here we show a low-cost aqueous solution approach to prepare Cu2ZnSn(S,Se)4 thin films: SnS/CuS/ZnS precursor layers were prepared by chemical bath deposition firstly and then the precursor films were selenized in a graphite box under inert gas atmosphere. By optimizing the fabrication parameters, CZTSSe thin films with good quality could be obtained. The films were characterized by XRD, SEM, EDX, etc. Finally, first CZTSSe solar cells could be fabricated the properties of which will be discussed in our contribution.

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