Visible light response, electrical transport, and amorphization in compressed organolead iodine perovskites

Nanoscale
Tianji OuChunxiao Gao

Abstract

Recent scientific advances on organic-inorganic hybrid perovskites are mainly focused on the improvement of power conversion efficiency. So far, how compression tunes their electronic and structural properties remains less understood. By combining in situ photocurrent, impedance spectroscopy, and X-ray diffraction (XRD) measurements, we have studied the electrical transport and structural properties of compressed CH3NH3PbI3 (MAPbI3) nanorods. The visible light response of MAPbI3 remains robust below 3 GPa while it is suppressed when it becomes amorphous. Pressure-induced electrical transport properties of MAPbI3 including resistance, relaxation frequency, and relative permittivity have been investigated under pressure up to 8.5 GPa by in situ impedance spectroscopy measurements. These results indicate that the discontinuous changes of these physical parameters occur around the structural phase transition pressure. The XRD studies of MAPbI3 under high pressure up to 20.9 GPa show that a phase transformation below 0.7 GPa, could be attributed to the tilting and distortion of PbI6 octahedra. And pressure-induced amorphization is reversible at a low density amorphous state but irreversible at a relatively higher density state. Furt...Continue Reading

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Citations

Jul 23, 2016·Proceedings of the National Academy of Sciences of the United States of America·Lingping KongHo-Kwang Mao
Aug 20, 2016·The Journal of Physical Chemistry Letters·Marek Szafrański, Andrzej Katrusiak
Apr 26, 2017·The Journal of Physical Chemistry Letters·Pan WangYang Song
May 13, 2017·The Journal of Physical Chemistry Letters·Marek Szafrański, Andrzej Katrusiak
May 27, 2017·The Journal of Physical Chemistry Letters·Paolo Postorino, Lorenzo Malavasi
Jul 7, 2017·Journal of the American Chemical Society·Guanjun XiaoBo Zou
Jul 12, 2017·The Journal of Physical Chemistry Letters·Rong ZhangShanti Deemyad
Nov 18, 2017·Chemical Science·Xujie LüHongwu Xu
Jun 1, 2019·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Alla ArakcheevaEndre Horváth
Nov 12, 2020·Physical Chemistry Chemical Physics : PCCP·Jia WangYonghao Han
May 12, 2021·Nature Chemistry·Bikash Kumar ShawThomas D Bennett
Jun 29, 2021·Nano Letters·Emma H MassasaYehonadav Bekenstein
Jun 15, 2017·The Journal of Physical Chemistry Letters·Huacai YanChunxiao Gao
Dec 18, 2018·The Journal of Physical Chemistry Letters·Hao MaZhiting Tian
Nov 14, 2019·The Journal of Physical Chemistry Letters·Mauro CoduriLorenzo Malavasi

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