Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.358
Publication date: 22nd December 2022
Tin halide perovskites display similar or even superior electronic and optical properties when compared to well-established Pb-based perovskites. Despite their favorable optoelectronic properties, the tin perovskite solar cells still exhibit power conversion efficiency (PCE) much lower than that of their lead analogs. This is mainly attributed to the fact that metastable Sn(II) in perovskite lattice is prone to the oxidation. The presence of Sn(IV) in the material results in self-doping and formation of non-radiative recombination centers. One of the strategies to overcome this obstacle is addition of bulky A-site cations which stabilize the resulting 3D films in a quasi-2D fashion or preparation of 2D tin halide perovskites. Especially in recent years, single crystal 2D-tin halide perovskites have attracted significant attention. However, the synthesis and growth of such materials high-quality remain very challenging. In this work, we report a comprehensive study of the synthesis and the growth of single-crystal 2D tin halide perovskites (Ruddlesden-Popper), which is still poorly explored (excluding extensively studied materials containing PEA derivatives acting as an A-site cations). By careful control the growth conditions (temperature, and composition), we obtained mm-sized (up to 10 mm), high-quality single crystals of 2D tin halide perovskites. The single crystals were characterized structurally and optically by means of inter alia X-ray diffraction, steady-state photoluminescence, and optical absorption.
Ł.P and A.H. acknowledge support from the National Science Centre (Poland) through the NCN OPUS grant UMO-2019/33/B/ ST3/03021.
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