中国物理B ›› 2019, Vol. 28 ›› Issue (7): 76102-076102.doi: 10.1088/1674-1056/28/7/076102

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Characterization of structural transitions and lattice dynamics of hybrid organic-inorganic perovskite CH3NH3PbI3

Feng Jin(金峰), Jian-Ting Ji(籍建葶), Chao Xie(谢超), Yi-Meng Wang(王艺朦), Shu-Na He(贺淑娜), Lei Zhang(张磊), Zhao-Rong Yang(杨昭荣), Feng Yan(严锋), Qing-Ming Zhang(张清明)   

  1. 1 Department of Physics, Renmin University of China, Beijing 100872, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;
    4 High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;
    5 School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2019-03-17 修回日期:2019-04-23 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Qing-Ming Zhang E-mail:qmzhang@ruc.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11774419) and the Ministry of Science and Technology of China (Grant Nos. 2016YFA0300504 and 2017YFA0302904).

Characterization of structural transitions and lattice dynamics of hybrid organic-inorganic perovskite CH3NH3PbI3

Feng Jin(金峰)1, Jian-Ting Ji(籍建葶)2, Chao Xie(谢超)3, Yi-Meng Wang(王艺朦)1, Shu-Na He(贺淑娜)1, Lei Zhang(张磊)4, Zhao-Rong Yang(杨昭荣)4, Feng Yan(严锋)3, Qing-Ming Zhang(张清明)2,5   

  1. 1 Department of Physics, Renmin University of China, Beijing 100872, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;
    4 High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;
    5 School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
  • Received:2019-03-17 Revised:2019-04-23 Online:2019-07-05 Published:2019-07-05
  • Contact: Qing-Ming Zhang E-mail:qmzhang@ruc.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11774419) and the Ministry of Science and Technology of China (Grant Nos. 2016YFA0300504 and 2017YFA0302904).

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摘要：

By combining temperature-dependent x-ray diffraction (XRD) with temperature-dependent Raman scattering, we have characterized the structural transitions and lattice dynamics of the hybrid organic-inorganic perovskite CH3NH3PbI3. The XRD measurements cover distinct phases between 15 K and 370 K and demonstrate a general positive thermal expansion. Clear anomalies are found around the transition temperatures. The temperature evolution of the lattice constants reveals that the transition at 160 K/330 K is of the first-/second-order type. Raman measurements uncover three strong low-frequency modes, which can be ascribed to the vibration of the Pb/I atoms. The temperature evolution of the modes clearly catches these transitions at 160 K and 330 K, and confirms the transition types, which are exactly consistent with the XRD results. The present study may set an experimental basis to understand the high conversion efficiency in methylammonium lead iodide.

关键词: x-ray diffraction, Raman scattering, hybrid organic-inorganic perovskite

Abstract:

By combining temperature-dependent x-ray diffraction (XRD) with temperature-dependent Raman scattering, we have characterized the structural transitions and lattice dynamics of the hybrid organic-inorganic perovskite CH3NH3PbI3. The XRD measurements cover distinct phases between 15 K and 370 K and demonstrate a general positive thermal expansion. Clear anomalies are found around the transition temperatures. The temperature evolution of the lattice constants reveals that the transition at 160 K/330 K is of the first-/second-order type. Raman measurements uncover three strong low-frequency modes, which can be ascribed to the vibration of the Pb/I atoms. The temperature evolution of the modes clearly catches these transitions at 160 K and 330 K, and confirms the transition types, which are exactly consistent with the XRD results. The present study may set an experimental basis to understand the high conversion efficiency in methylammonium lead iodide.

Key words: x-ray diffraction, Raman scattering, hybrid organic-inorganic perovskite

中图分类号:  (X-ray diffraction and scattering)

  • 61.05.C-
78.30.-j (Infrared and Raman spectra) 81.07.Pr (Organic-inorganic hybrid nanostructures)