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Research Paper

Applied Science and Convergence Technology 2018; 27(6): 169-172

Published online November 30, 2018

https://doi.org/10.5757/ASCT.2018.27.6.169

Copyright © The Korean Vacuum Society.

Fabrication of MASnI3 and MASnxPb(1-x)I3 Thin Films by Conversion from SnS Thin Film

Yeonghun Yuna, Jae Yu Chob, Jaeyeong Heob,*, and Sangwook Leea,*

aSchool of Materials Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea, bDepartment of Materials Science and Engineering, and Optoelectronics Convergence Research Center, Chonnam National University, Gwangju 61186, Republic of Korea

Correspondence to:*Corresponding author: E-mail: wook2@knu.ac.kr, jheo@jnu.ac.kr

Received: November 14, 2018; Accepted: November 26, 2018

Abstract

Methylammonium lead halide (MAPbI3), an organic-inorganic hybrid perovskite material, is promising as light absorbing materials of solar cells. Nevertheless, necessity of reducing Pb contents in the perovskite materials is increasing due to the toxicity of Pb. Recently, tin-lead mixed perovskite materials have been studied intensively, by dissolving Sn and Pb sources simultaneously in one precursor solution. Here, for the first time, we report a two-step method to synthesize MASnI3 and MASnxPb(1-x)I3 films. The films were prepared via spin-coating MAI or MAPbI3 precursors on as-prepared SnS thin films. Crystal structures, phases, surface chemical states, and morphologies of the MASnI3 and MASnxPb(1-x)I3 films were investigated. Our two-step method is expected to be used not only for Sn based perovskites but also for diverse compositions of perovskite materials.

Keywords: Organic-inorganic hybrid perovskite, MASnI3, MASnxPb1-xI3, SnS, Thin film

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