Chemical nature of ferroelastic twin domains in CH3 NH3 PbI3 perovskite

Nature Materials
Yongtao LiuOlga S Ovchinnikova

Abstract

The extraordinary optoelectronic performance of hybrid organic-inorganic perovskites has resulted in extensive efforts to unravel their properties. Recently, observations of ferroic twin domains in methylammonium lead triiodide drew significant attention as a possible explanation for the current-voltage hysteretic behaviour in these materials. However, the properties of the twin domains, their local chemistry and the chemical impact on optoelectronic performance remain unclear. Here, using multimodal chemical and functional imaging methods, we unveil the mechanical origin of the twin domain contrast observed with piezoresponse force microscopy in methylammonium lead triiodide. By combining experimental results with first principles simulations we reveal an inherent coupling between ferroelastic twin domains and chemical segregation. These results reveal an interplay of ferroic properties and chemical segregation on the optoelectronic performance of hybrid organic-inorganic perovskites, and offer an exploratory path to improving functional devices.

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Citations

Mar 16, 2019·Advanced Materials·Guankui LongWeibo Gao
Jan 31, 2019·Annual Review of Analytical Chemistry·Tom WirtzPatrick Philipp
Jul 11, 2019·Chemical Communications : Chem Comm·Wei YuanXiao-Ming Chen
Sep 19, 2019·Nature Materials·Yongtao LiuOlga S Ovchinnikova
Sep 19, 2019·Nature Materials·Alexander D SchulzAlexander Colsmann
May 21, 2020·Polymers·Phuong Nguyen-TriDinh Duc Nguyen
Oct 13, 2020·Advanced Science·Yongtao LiuOlga S Ovchinnikova
Jan 8, 2021·Nanoscale·Haian Qiu, Jeffrey M Mativetsky
Jan 20, 2021·Physical Chemistry Chemical Physics : PCCP·Alessandra Geddo LehmannGiovanni Bongiovanni
Feb 24, 2021·Nanotechnology·Tsung Sheng KaoTien-Chang Lu
May 22, 2021·The Journal of Physical Chemistry Letters·Feifan WangX-Y Zhu
Jul 14, 2021·ACS Applied Materials & Interfaces·Dohyung Kim, Mahshid Ahmadi
May 12, 2020·Journal of the American Chemical Society·Xiao-Gang ChenRen-Gen Xiong
Mar 12, 2019·The Journal of Physical Chemistry Letters·Andrew R WarwickNicholas C Bristowe
Sep 5, 2019·Analytical Chemistry·Songkil KimOlga S Ovchinnikova
Dec 2, 2020·Analytical Chemistry·A Catarina V D Dos SantosBernhard Lendl
Dec 16, 2020·Journal of the American Chemical Society·Feifan WangX-Y Zhu
Jul 4, 2019·ACS Nano·Liam CollinsRoger Proksch
Sep 2, 2020·ACS Applied Materials & Interfaces·Liam Collins, Umberto Celano
Sep 18, 2021·Nature Materials·Dongtao LiuWei Zhang

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Methods Mentioned

BETA
PFM
imaging techniques
atomic force microscopy
scanning electron microscopy
fluorescence microscopy
AFM
transmission electron microscopy
light harvesting
infrared
X-ray

Software Mentioned

Vienna Ab Initio Simulation Package
TIRFM
LabVIEW

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