Vapor deposition of metal halide perovskites – photovoltaics and beyond Yana Vayznof Technical University of Dresden, Germany In recent years, remarkable progress has been made in the field of perovskite solar cells, resulting in power conversion efficiencies (PCE) of 26%. While the vast majority of research efforts are dedicated to their processing from solution, metal halide perovskites can also be deposited by thermal evaporation. It is a solvent-free, scalable method of high industrial relevance offering high throughput, homogeneity, material economy, safety, yield and controllability. In this talk, I will present a range of applications in which the utilization of vapor deposited perovskites offers clear advantages to their processing from solution. For example, I will introduce a new concept for photovoltaic devices that exploits the polymorphism of perovskite materials to form a phase heterojunction solar cell. The concept relies on the fabrication of a β-CsPbI 3 bottom layer by solution processing and a top γ-CsPbI 3 layer by thermal evaporation. [1,2] I will also introduce an outlook to utilizing vapor deposited perovskites in applications beyond photovoltaics.
References 1. Z. Zhang et al., Adv. Energy Mater. 2021 , 11 (29), 2100299. 2. R. Ji et al. Nature Energy 2022 , 7, 1170.
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