globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.05.020
论文题名:
Transmission electron microscopy of organic-inorganic hybrid perovskites: myths and truths
作者: Chen S.; Zhang Y.; Zhao J.; Mi Z.; Zhang J.; Cao J.; Feng J.; Zhang G.; Qi J.; Li J.; Gao P.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期:19
起始页码: 1643
结束页码: 1649
语种: 英语
中文关键词: Atomic structure CH3NH3PbI3 ; Beam damage mechanism ; Facet dependency ; Organic-inorganic hybrid perovskites ; Transmission electron microscopy
英文关键词: Degradation ; Electrons ; High resolution transmission electron microscopy ; Perovskite ; Perovskite solar cells ; Temperature ; Transmissions ; Accelerating voltages ; Degradation mechanism ; Electron diffraction and imaging ; Optimized conditions ; Organic-inorganic hybrid ; Structural degradation ; Structural instability ; Transmission electron microscopy (TEM) characterizations ; organic-inorganic materials
英文摘要: Organic-inorganic hybrid perovskites (OIHPs) have attracted extensive research interest as a promising candidate for efficient and inexpensive solar cells. Transmission electron microscopy (TEM) characterizations that can benefit the fundamental understanding and the degradation mechanism are widely used for these materials. However, their sensitivity to the electron beam illumination and hence structural instabilities usually prevent us from obtaining the intrinsic information or even lead to significant artifacts. Here, we systematically investigate the structural degradation behaviors under different experimental factors to reveal the optimized conditions for TEM characterizations of OIHPs by using low-dose electron diffraction and imaging techniques. We find that a low temperature (−180 °C) does not slow down the beam damage but instead induces a rapid amorphization for OIHPs. Moreover, a less severe damage is observed at a higher accelerating voltage. The beam-sensitivity is found to be facet-dependent that a (1 0 0) exposed CH3NH3PbI3 (MAPbI3) surface is more stable than a (0 0 1) surface. With these guidance, we successfully acquire the atomic structure of pristine MAPbI3 and identify the characterization window that is very narrow. These findings are helpful to guide future electron microscopy characterizations of these beam-sensitive materials, which are also useful for finding strategies to improve the stability and performance of the perovskite solar cells. © 2020 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169862
Appears in Collections:气候变化与战略

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作者单位: Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, 100871, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China; School of Materials Science and Engineering, School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China; Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China; Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China; International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China

Recommended Citation:
Chen S.,Zhang Y.,Zhao J.,et al. Transmission electron microscopy of organic-inorganic hybrid perovskites: myths and truths[J]. Science Bulletin,2020-01-01,65(19)
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