Strain–Chemical Gradient and Polarization in Metal Halide Perovskites
Abstract
Metal halide perovskites (MHPs) have attracted broad research interest due to their outstanding optoelectronic performance. This performance has been attributed in part to the presence of polarization in these materials. However, the precise effects of chemical environment and strain condition on the polar states in MHPs have largely been missing. Herein it is revealed for the first time that chemical gradient is directly coupled with strain gradient in CH3NH3PbI3. This strain–chemical gradient induces an electric polarization that can potentially affect charge carrier dynamics. Furthermore, it is unveiled that this electric polarization—unlike ferroelectricity that only exists in noncentrosymmetric materials—can be present in both tetragonal and cubic phases of CH3NH3PbI3. This suggests that the strain–chemical gradient induced polarization is a more convincing explanation of the outstanding photovoltaic properties of MHPs than the hotly debated ferroelectric polarization. Finally, a mechanism of how this polarization impacts photovoltaic action is proposed, which offers insightful advances in the development of MHPs.
- Authors:
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[1];
[2];
[2];
[2];
[3];
[2];
[2];
[2];
[5];
[5];
[2];
[2]
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS); Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS) and Neutron Scattering Division
- Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS) and Computational Sciences & Engineering Division
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC); US Air Force Office of Scientific Research (AFOSR); Asian Office of Aerospace Research and Development (AOARD); National Science Foundation (NSF); University of Tennessee Higher Education Commission
- OSTI Identifier:
- 1615225
- Grant/Contract Number:
- AC05-00OR22725; FA 9550-15-1-0064; FA2386-15-1-4104; CBET-1438181
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Electronic Materials
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 4; Journal ID: ISSN 2199-160X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; charge dissociation; chemical gradients; metal halide perovskites; polarization strain gradients
Citation Formats
Liu, Yongtao, Ievlev, Anton V., Collins, Liam, Belianinov, Alex, Keum, Jong K., Ahmadi, Mahshid, Jesse, Stephen, Retterer, Scott T., Xiao, Kai, Huang, Jingsong, Sumpter, Bobby G., Kalinin, Sergei V., Hu, Bin, and Ovchinnikova, Olga S. Strain–Chemical Gradient and Polarization in Metal Halide Perovskites. United States: N. p., 2020.
Web. doi:10.1002/aelm.201901235.
Liu, Yongtao, Ievlev, Anton V., Collins, Liam, Belianinov, Alex, Keum, Jong K., Ahmadi, Mahshid, Jesse, Stephen, Retterer, Scott T., Xiao, Kai, Huang, Jingsong, Sumpter, Bobby G., Kalinin, Sergei V., Hu, Bin, & Ovchinnikova, Olga S. Strain–Chemical Gradient and Polarization in Metal Halide Perovskites. United States. https://doi.org/10.1002/aelm.201901235
Liu, Yongtao, Ievlev, Anton V., Collins, Liam, Belianinov, Alex, Keum, Jong K., Ahmadi, Mahshid, Jesse, Stephen, Retterer, Scott T., Xiao, Kai, Huang, Jingsong, Sumpter, Bobby G., Kalinin, Sergei V., Hu, Bin, and Ovchinnikova, Olga S. Mon .
"Strain–Chemical Gradient and Polarization in Metal Halide Perovskites". United States. https://doi.org/10.1002/aelm.201901235. https://www.osti.gov/servlets/purl/1615225.
@article{osti_1615225,
title = {Strain–Chemical Gradient and Polarization in Metal Halide Perovskites},
author = {Liu, Yongtao and Ievlev, Anton V. and Collins, Liam and Belianinov, Alex and Keum, Jong K. and Ahmadi, Mahshid and Jesse, Stephen and Retterer, Scott T. and Xiao, Kai and Huang, Jingsong and Sumpter, Bobby G. and Kalinin, Sergei V. and Hu, Bin and Ovchinnikova, Olga S.},
abstractNote = {Metal halide perovskites (MHPs) have attracted broad research interest due to their outstanding optoelectronic performance. This performance has been attributed in part to the presence of polarization in these materials. However, the precise effects of chemical environment and strain condition on the polar states in MHPs have largely been missing. Herein it is revealed for the first time that chemical gradient is directly coupled with strain gradient in CH3NH3PbI3. This strain–chemical gradient induces an electric polarization that can potentially affect charge carrier dynamics. Furthermore, it is unveiled that this electric polarization—unlike ferroelectricity that only exists in noncentrosymmetric materials—can be present in both tetragonal and cubic phases of CH3NH3PbI3. This suggests that the strain–chemical gradient induced polarization is a more convincing explanation of the outstanding photovoltaic properties of MHPs than the hotly debated ferroelectric polarization. Finally, a mechanism of how this polarization impacts photovoltaic action is proposed, which offers insightful advances in the development of MHPs.},
doi = {10.1002/aelm.201901235},
journal = {Advanced Electronic Materials},
number = 4,
volume = 6,
place = {United States},
year = {Mon Jan 27 00:00:00 EST 2020},
month = {Mon Jan 27 00:00:00 EST 2020}
}
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