期刊
FRONTIERS IN CHEMISTRY
卷 9, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2021.753141
关键词
sequential vacuum evaporation; atomic structure; chemical state; THz-wave absorption; MA(Sn; Pb)(Br I)(3)
资金
- Izumi Zaidan (Japan)
- Basic Science Research Program through the NRF - Korean Ministry of Education [NRF-2020R1C1C1013646]
This study verified the possibility of changing terahertz absorption frequency through the mixture of metal cations (Sn+ and Pb+) and halogen anions (Br- and I-).
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.
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