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Visualizing the Impact of Light Soaking on Morphological Domains in an Operational Cesium Lead Halide Perovskite Solar Cell

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posted on 2024-07-11, 13:53 authored by Thi-Hai-Yen Vu, Weijian Chen, Xiaofan Deng, Cho Fai Jonathan Lau, Shujuan Huang, Anita Ho-Baillie, Baohua Jia, Xiaoming Wen
The dynamics of photogenerated carriers and mobile ions in operational cesium lead halide (CsPbI3) perovskite solar cells (PSCs) under working conditions are studied using nanoscale-resolved fluorescence lifetime imaging microscopy (FLIM). The temporally and spatially resolved photoluminescence (PL) changes in the perovskite film during and after bias light soaking are dynamically monitored. Through the analysis of the dynamic variations of PL intensity and PL lifetime of an open-circuit PSC, the impacts of light soaking are revealed by a dynamic model of photogenerated charge carrier and mobile ions. We confirmed the different behaviors between morphological domain interiors and domain boundaries during light soaking, which shed light on the engineering of the domain interiors in addition to the commonly considered domain boundary strategies. This work provides a full picture of the photogenerated process in an operational PSC and therefore guides the design and operation of perovskite-based optoelectronic devices.

Funding

ARC | DP190103186

ARC | DP190103284

Photonic crystals: the key to breaking the Si-solar cell efficiency barrier : Australian Research Council (ARC) | DP190103284

Perpetual photothermal modulation with scalable hybrid graphene films : Australian Research Council (ARC) | DP190103186

History

Available versions

PDF (Accepted manuscript)

ISSN

1948-7185

Journal title

Journal of Physical Chemistry Letters

Volume

11

Issue

1

Pagination

136-143

Publisher

American Chemical Society (ACS)

Copyright statement

This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry Letters, copyright © American Chemical Society 2019, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.9b03210.

Language

eng

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