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Photoinduced Reversible Structural Transformations in Free-Standing CH3NH3PbI3 Perovskite Films

Open access
Gottesman, Ronen, Gouda, Laxman, Kalanoor, Basanth S., Haltzi, Eynav, Tirosh, Shay, Rosh-Hodesh, Eli, Tischler, Yaakov, Zaban, Arie, Quarti, Claudio, Mosconi, Edoardo, De Angelis, Filippo·2015·The Journal of Physical Chemistry Letters

Abstract

In the pursuit to better understand the mechanisms of perovskite solar cells we performed Raman and photoluminescence measurements of free-standing CH3NH3PbI3 films, comparing dark with working conditions. The films, grown on a glass substrate and sealed by a thin glass coverslip, were measured subsequent to dark and white-light pretreatments. The extremely slow changes we observe in both the Raman and photoluminescence cannot be regarded as electronic processes, which are much faster. Thus, the most probable explanation is of slow photoinduced structural changes. The CH3NH3PbI3 transformation between the dark and the light structures is reversible, with faster rates for the changes under illumination. The results seem to clarify several common observations associated with solar cell mechanisms, like performance improvement under light soaking. More important is the call for solar-cell-related investigation of CH3NH3PbI3 to take the photoinduced structural changes into consideration when measuring and interpreting the results.

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Crossref · 10.1021/acs.jpclett.5b00994

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Metadata

Authors
Gottesman, R., Gouda, L., Kalanoor, B. S., Haltzi, E., Tirosh, S., Rosh-Hodesh, E., Tischler, Y., Zaban, A., Quarti, C., Mosconi, E., & De Angelis, F.
Venue
The Journal of Physical Chemistry Letters
Published
2015-06-08
Volume
6
Issue
12
Pages
2332-2338
ISSN
1948-7185 (ISSN-L)
OpenAlex
W1449148913
Cited by
222
References
3
FWCI
15.88
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Photoinduced Reversible Structural Transformations in Free-Standing CH3NH3PbI3 Perovskite Films. https://app.cochat.ai/papers/10.1021/acs.jpclett.5b00994
The paper
Gottesman, R., Gouda, L., Kalanoor, B. S., Haltzi, E., Tirosh, S., Rosh-Hodesh, E., Tischler, Y., Zaban, A., Quarti, C., Mosconi, E., & De Angelis, F. (2015). Photoinduced Reversible Structural Transformations in Free-Standing CH3NH3PbI3 Perovskite Films. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/acs.jpclett.5b00994

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