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Title: Dynamic behavior of CH 3NH 3PbI 3 perovskite twin domains

We report the recent discovery of twin domains in MAPbI 3 perovskites has initiated contentious discussion on the ferroic nature of hybrid perovskites. Ferroelectric polarization is thought to facilitate the dissociation of photoinduced electron-hole pairs, helping to explain the extraordinary photovoltaic performance exhibited by this class of materials. Alternate to ferroelectricity, which has yet to be unambiguously established despite considerable efforts to do so, ferroelasticity was also proposed in these materials. Meanwhile, given the coupling of ionic states and ferroelectricity and the interconnected nature of defect chemistry and ferroelasticity, the electrochemical reactivity can no longer be ignored. In this work, using band excitation piezoresponse force microscopy, we reveal the variation in elasticity between adjacent domains, indicating the ferroelasticity and the difference in the crystallographic states of the twin domain. Moreover, using band excitation contact Kelvin probe force microscopy, we dynamically map the evolution of the twinning structure under electric bias. These results help decipher the effect of the twin domains on ionic mobility and ion diffusion pathways. Combining these results, we reveal the interaction of twin domains and ionic activity in this material. Furthermore, this work provides insights into the twinning structure in MAPbI 3 and its potential effects onmore » the hybrid perovskite optoelectronics.« less
Authors:
ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [2] ; ORCiD logo [2] ; ORCiD logo [2] ;  [3] ; ORCiD logo [2] ; ORCiD logo [2] ; ORCiD logo [2] ; ORCiD logo [2] ;  [3] ; ORCiD logo [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS); Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  3. Univ. of Tennessee, Knoxville, TN (United States). Department of Materials Science and Engineering
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 113; Journal Issue: 7; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1474602
Alternate Identifier(s):
OSTI ID: 1464317

Liu, Yongtao, Collins, Liam F., Belianinov, Alex, Neumayer, Sabine M., Ievlev, Anton V., Ahmadi, Mahshid, Xiao, Kai, Retterer, Scott T., Jesse, Stephen, Kalinin, Sergei V., Hu, Bin, and Ovchinnikova, Olga S.. Dynamic behavior of CH3NH3PbI3 perovskite twin domains. United States: N. p., Web. doi:10.1063/1.5041256.
Liu, Yongtao, Collins, Liam F., Belianinov, Alex, Neumayer, Sabine M., Ievlev, Anton V., Ahmadi, Mahshid, Xiao, Kai, Retterer, Scott T., Jesse, Stephen, Kalinin, Sergei V., Hu, Bin, & Ovchinnikova, Olga S.. Dynamic behavior of CH3NH3PbI3 perovskite twin domains. United States. doi:10.1063/1.5041256.
Liu, Yongtao, Collins, Liam F., Belianinov, Alex, Neumayer, Sabine M., Ievlev, Anton V., Ahmadi, Mahshid, Xiao, Kai, Retterer, Scott T., Jesse, Stephen, Kalinin, Sergei V., Hu, Bin, and Ovchinnikova, Olga S.. 2018. "Dynamic behavior of CH3NH3PbI3 perovskite twin domains". United States. doi:10.1063/1.5041256.
@article{osti_1474602,
title = {Dynamic behavior of CH3NH3PbI3 perovskite twin domains},
author = {Liu, Yongtao and Collins, Liam F. and Belianinov, Alex and Neumayer, Sabine M. and Ievlev, Anton V. and Ahmadi, Mahshid and Xiao, Kai and Retterer, Scott T. and Jesse, Stephen and Kalinin, Sergei V. and Hu, Bin and Ovchinnikova, Olga S.},
abstractNote = {We report the recent discovery of twin domains in MAPbI3 perovskites has initiated contentious discussion on the ferroic nature of hybrid perovskites. Ferroelectric polarization is thought to facilitate the dissociation of photoinduced electron-hole pairs, helping to explain the extraordinary photovoltaic performance exhibited by this class of materials. Alternate to ferroelectricity, which has yet to be unambiguously established despite considerable efforts to do so, ferroelasticity was also proposed in these materials. Meanwhile, given the coupling of ionic states and ferroelectricity and the interconnected nature of defect chemistry and ferroelasticity, the electrochemical reactivity can no longer be ignored. In this work, using band excitation piezoresponse force microscopy, we reveal the variation in elasticity between adjacent domains, indicating the ferroelasticity and the difference in the crystallographic states of the twin domain. Moreover, using band excitation contact Kelvin probe force microscopy, we dynamically map the evolution of the twinning structure under electric bias. These results help decipher the effect of the twin domains on ionic mobility and ion diffusion pathways. Combining these results, we reveal the interaction of twin domains and ionic activity in this material. Furthermore, this work provides insights into the twinning structure in MAPbI3 and its potential effects on the hybrid perovskite optoelectronics.},
doi = {10.1063/1.5041256},
journal = {Applied Physics Letters},
number = 7,
volume = 113,
place = {United States},
year = {2018},
month = {8}
}

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