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Reversible Ionic Polarization in Metal Halide Perovskites
Nanjing Univ, Peoples R China.
Nanjing Univ, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
Nanjing Univ, Peoples R China.
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2021 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 125, no 1, p. 283-289Article in journal (Refereed) Published
Abstract [en]

Metal halide perovskites have emerged as promising photovoltaic materials with attractive photoelectronic properties. However, the fundamental mechanisms for their outstanding properties are still elusive. In this work, we reveal the reversible bulk ionic polarization property of perovskites through studying the photoelectric response on the controllable states by electrical poling from room temperature to low temperature (200 K). The overall increase in light absorption, photoconductance, and carrier recombination lifetime demonstrates that the bulk ionic polarization contributes to the excellent photoelectric properties of halide perovskites. Moreover, we also discuss the role of ionic polarization in the overshoot transient photocurrent relaxation phenomenon after the electrical poling. This work would promote deep understanding in the unique properties of perovskites and their excellent photovoltaic performance.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2021. Vol. 125, no 1, p. 283-289
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-174155DOI: 10.1021/acs.jpcc.0c10416ISI: 000611410300029OAI: oai:DiVA.org:liu-174155DiVA, id: diva2:1537218
Note

Funding Agencies|Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11974167]; National Key Research Program of China [2016YFA0300101, 2016YFA0201004]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [14380161]; Carl Tryggers Stiftelse; Swedish Research CouncilSwedish Research CouncilEuropean Commission [VR 2019-05279]

Available from: 2021-03-15 Created: 2021-03-15 Last updated: 2021-03-15

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Wang, FengBao, ChunxiongGao, Feng
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