Relationship between ion vacancy mobility and hysteresis of perovskite solar cells

[Display omitted] The relation between ion vacancy mobility and hysteresis of perovskite solar cells (PSCs) is investigated by computer simulation. Due to the ion vacancy migration, the hysteresis in PSCs strongly depends on the scan rate of J-V sweeps. The hysteresis only occurs in certain regime o...

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Bibliographic Details
Published in:Chemical physics 2022-02, Vol.554, p.111422, Article 111422
Main Author: Lin, Zedong
Format: Article
Language:English
Subjects:
Hysteresis
Ion vacancy migration
Mobility
Perovskite solar cells
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Summary:[Display omitted] The relation between ion vacancy mobility and hysteresis of perovskite solar cells (PSCs) is investigated by computer simulation. Due to the ion vacancy migration, the hysteresis in PSCs strongly depends on the scan rate of J-V sweeps. The hysteresis only occurs in certain regime of scan rate. We calculate the evolution of ionic charge density stored within the Debye layers to discuss the process of ion vacancy migration and the variation of ion vacancy accumulation during the J-V sweeps. Based on this discussion, we give the physical picture of hysteresis. We discover that the regime of scan rate where hysteresis shows up moves towards higher value with increasing mobility of ion vacancy.
ISSN:0301-0104
DOI:10.1016/j.chemphys.2021.111422