Terahertz Vibrational Modes in CH3NH3PbI3 and CsPbI3 Perovskite Films

被引：14
作者：
Andrianov, A., V [1 ]
Aleshin, A. N. [1 ]
Matyushkin, L. B. [2 ]
机构：
[1] Russian Acad Sci, Ioffe Phys Tech Inst, St Petersburg 194021, Russia
[2] St Petersburg State Electrotech Univ LETI, St Petersburg 197376, Russia
来源：
JETP LETTERS | 2019年 / 109卷 / 01期
关键词：
FIELD-EFFECT TRANSISTORS; SMALL HYSTERESIS; CH(3)NH(3)PBL(3); MOBILITIES; DISORDER;
D O I：
10.1134/S0021364019010053
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Films of CH3NH3PbI3 organometallic perovskite, which is currently considered as a promising basic material for new-generation solar cells, as well as films containing CsPbI3 inorganic lead-halid perovskite nanocrystals, have been studied in the spectral range of 0.2-2.9 THz at room temperature by terahertz time-domain spectroscopy. Several low-frequency vibrational modes previously attributed exclusively to vibrations of Pb-I bonds have been observed in the perovskite films under investigation in this spectral range. The comparison of terahertz characteristics of perovskites under study has shown that vibrations associated with a cation (CH3 NH3+, Cs+) make a significant contribution to the formation of the observed low-frequency vibrational modes in perovskites under consideration.
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收藏
页码：28 / 32
页数：5
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