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DS: Fachverband Dünne Schichten

DS 11: Thin Film Properties: Structure, Morphology and Composition (XRD, TEM, XPS, SIMS, RBS, AFM, ...): Session II

DS 11.5: Vortrag

Dienstag, 13. März 2018, 10:30–10:45, H 0111

Modification of SbSI Morphology for Solar Cell Applications — •Sara Sand, Ka Kan Wong, Susanne T. Birkhold, Eugen Zimmerman, and Lukas Schmidt-Mende — University Konstanz, Konstanz, Germany

Thin film solar cells display many benefits due to their solution-based processing, allowing for inexpensive manufacturing and the possibility of devices on flexible substrates. Recently, perovskite solar cells have dominated this area of research due to their rapidly increasing efficiency, but this material still has many drawbacks due to its toxicity and lack of durability. Antimony sulfoiodide (SbSI) has been identified as a promising material for these applications, because it is much more stable and is similarly defect tolerant. It also has ferroelectric behavior with phase transition around room-temperature and its ionic characteristics. These two properties have been largely discussed in reference to perovskites, but, as of yet, their role in solar cell function is not well understood. The aim of this study is to investigate the ferroelectric and ionic characteristics of SbSI and their impact on solar cell devices. However, SbSI solar cells have not yet been reported in literature, as typical SbSI films possess very uneven surface structures composed of large crystallites. Here we present a novel approach to control the film formation of SbSI. By performing the two-step conversion process of SbSI under elevated pressure within a hot press, even and dense films of SbSI are achieved. Application of these films into devices will allow us to compare ferroelectric and ionic properties of perovskite and SbSI solar cells.