Fabrication of air-stable tin perovskites

Saif Haque^a, Luis Lanzetta^a, Tianlun Liang^a, Luis Martinez^a, Olivia Ashton^a, Irene Sanchez-Molina^a

^aImperial College London, United Kingdom, South Kensington, Londres, Reino Unido, United Kingdom

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Irene Sanchez-Molina, 296
Publication date: 5th February 2015

Lead perovskites are currently leading the efficiency race in the field of photovoltaics, with record efficiency around 19%[1] Their potential application may be hindered, though, mainly by the high toxicity of lead. Although tin(II) is the obvious substitute, the materials containing this metal are usually air sensitive and unstable. In this poster we summarize the recent work carried out in our lab towards the fabrication of stable tin perovskites.[2,3] Our main strategies are based on the preparation of mixed-halide Sn(II) perovskites and on the synthesis of Sn(IV) perovskites. All the materials have been characterized by UV-Vis absorption spectroscopy, fluorescence spectroscopy, X-Ray diffraction and microscopy techniques. The same techniques have been applied to the study of the stability of the materials. We are also working on the development of a method for the preparation of Sn(II) perovskite films via Chemical Bath deposition. Preliminary results on device fabrication and micro-to-milisecond transient absorption spectroscopy studies will be discussed.

[1] Zhou H, Chen Q, Li G, Luo S, Song T-b, Duan H-S, et al. Science. 2014, 345(6196),542-6. [2] Stoumpos C. C, Malliakas C. D, Kanatzidis M. G, Inorg. Chem. 2013, 52, 9019−9038. [3] Lee B, Stoumpos C. C, Zhou N, Hao F, Malliakas C, Yeh C-Y, Kanatzidis M. G, Chang R. P. H, J. Am. Chem. Soc., 2014, 136 (43), 15379–15385.

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