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Photoprotection in metal halide perovskites by ionic defect formation

Phung, Nga ; Mattoni, Alessandro ; Smith, Joel A. ; Skroblin, Dieter ; Köbler, Hans ; Choubrac, Leo ; Breternitz, Joachim ; Li, Jinzhao ; Unold, Thomas and Schorr, Susan , et al. (2022) In Joule 6(9). p.2152-2174
Abstract

Photostability is critical for long-term solar cell operation. While light-triggered defects are usually reported as evidence of material degradation, we reveal that the formation of certain defects in metal halide perovskites is crucial for protection against intense or prolonged light exposure. We identify an inherent self-regulating cycle of formation and recovery of ionic defects under light exposure that mitigates the overheating of the lattice due to hot carrier cooling, which allows exposure to several thousand suns without degrading. The excess energy instead dissipates by forming defects, which in turn alters the optoelectronic properties of the absorber, resulting in a temporary reduction of photon absorption. Defects... (More)

Photostability is critical for long-term solar cell operation. While light-triggered defects are usually reported as evidence of material degradation, we reveal that the formation of certain defects in metal halide perovskites is crucial for protection against intense or prolonged light exposure. We identify an inherent self-regulating cycle of formation and recovery of ionic defects under light exposure that mitigates the overheating of the lattice due to hot carrier cooling, which allows exposure to several thousand suns without degrading. The excess energy instead dissipates by forming defects, which in turn alters the optoelectronic properties of the absorber, resulting in a temporary reduction of photon absorption. Defects gradually recover to restore the original optoelectronic properties of the absorber. Photoprotection is a key feature for the photostability in plants. Thus, finding a protection mechanism in metal halide perovskites similar to those in nature is encouraging for the development of long-term sustainable solar cells.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
concentration PV, defect chemistry, defect recovery, density functional theory, halide perovskite, molecular dynamic simulation, photoluminescence, photoprotection, photostability, thermal imaging
in
Joule
volume
6
issue
9
pages
23 pages
publisher
Cell Press
external identifiers
  • scopus:85136747050
ISSN
2542-4351
DOI
10.1016/j.joule.2022.06.029
language
English
LU publication?
yes
id
4389270e-fb22-4b91-b515-64744d999518
date added to LUP
2022-10-24 11:53:41
date last changed
2023-11-20 23:53:55
@article{4389270e-fb22-4b91-b515-64744d999518,
  abstract     = {{<p>Photostability is critical for long-term solar cell operation. While light-triggered defects are usually reported as evidence of material degradation, we reveal that the formation of certain defects in metal halide perovskites is crucial for protection against intense or prolonged light exposure. We identify an inherent self-regulating cycle of formation and recovery of ionic defects under light exposure that mitigates the overheating of the lattice due to hot carrier cooling, which allows exposure to several thousand suns without degrading. The excess energy instead dissipates by forming defects, which in turn alters the optoelectronic properties of the absorber, resulting in a temporary reduction of photon absorption. Defects gradually recover to restore the original optoelectronic properties of the absorber. Photoprotection is a key feature for the photostability in plants. Thus, finding a protection mechanism in metal halide perovskites similar to those in nature is encouraging for the development of long-term sustainable solar cells.</p>}},
  author       = {{Phung, Nga and Mattoni, Alessandro and Smith, Joel A. and Skroblin, Dieter and Köbler, Hans and Choubrac, Leo and Breternitz, Joachim and Li, Jinzhao and Unold, Thomas and Schorr, Susan and Gollwitzer, Christian and Scheblykin, Ivan G. and Unger, Eva L. and Saliba, Michael and Meloni, Simone and Abate, Antonio and Merdasa, Aboma}},
  issn         = {{2542-4351}},
  keywords     = {{concentration PV; defect chemistry; defect recovery; density functional theory; halide perovskite; molecular dynamic simulation; photoluminescence; photoprotection; photostability; thermal imaging}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{9}},
  pages        = {{2152--2174}},
  publisher    = {{Cell Press}},
  series       = {{Joule}},
  title        = {{Photoprotection in metal halide perovskites by ionic defect formation}},
  url          = {{http://dx.doi.org/10.1016/j.joule.2022.06.029}},
  doi          = {{10.1016/j.joule.2022.06.029}},
  volume       = {{6}},
  year         = {{2022}},
}