Terahertz Wave Absorption Property of all Mixed Organic-Inorganic Hybrid Perovskite Thin Film MA(Sn, Pb)(Br, I)3 Fabricated by Sequential Vacuum Evaporation Method

Inhee Maeng; Hiroshi Tanaka; Valynn Katrine Mag-Usara; Makoto Nakajima; Masakazu Nakamura; Min-Cherl Jung

doi:10.3389/fchem.2021.753141

Terahertz Wave Absorption Property of all Mixed Organic-Inorganic Hybrid Perovskite Thin Film MA(Sn, Pb)(Br, I)₃ Fabricated by Sequential Vacuum Evaporation Method

Front Chem. 2021 Sep 16:9:753141. doi: 10.3389/fchem.2021.753141. eCollection 2021.

Authors

Inhee Maeng¹, Hiroshi Tanaka², Valynn Katrine Mag-Usara³, Makoto Nakajima³, Masakazu Nakamura², Min-Cherl Jung⁴

Affiliations

¹ YUHS-KRIBB, Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul, South Korea.
² Division of Materials Science, Nara Institute of Science and Technology, Ikoma, Japan.
³ Institute of Laser Engineering, Osaka University, Suita, Japan.
⁴ Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Ibaraki, Japan.

Abstract

All mixed hybrid perovskite (MA(Sn, Pb)(Br,I)₃) thin film was fabricated by sequential vacuum evaporation method. To optimize the first layer with PbBr₂ and SnI₂, we performed different annealing treatments. Further, MA(Sn, Pb)(Br, I)₃ thin film was synthesized on the optimized first layer by evaporating MAI and post-annealing. The formed hybrid perovskite thin film exhibited absorptions at 1.0 and 1.7 THz with small absorbance (<10%). Moreover, no chemical and structural defect-incorporated absorption was found. In this study, the possibility of changing terahertz absorption frequency through the mixture of metal cations (Sn⁺ and Pb⁺) and halogen anions (Br^- and I^-) was verified.

Keywords: MA(Sn, Pb)(Br I)3; THz-wave absorption; atomic structure; chemical state; sequential vacuum evaporation.