Light-activated interlayer contraction in two-dimensional perovskites for high-efficiency solar cells.
Journal
Nature nanotechnology
ISSN: 1748-3395
Titre abrégé: Nat Nanotechnol
Pays: England
ID NLM: 101283273
Informations de publication
Date de publication:
Jan 2022
Jan 2022
Historique:
received:
23
03
2021
accepted:
13
09
2021
pubmed:
24
11
2021
medline:
24
11
2021
entrez:
23
11
2021
Statut:
ppublish
Résumé
Understanding and tailoring the physical behaviour of halide perovskites under practical environments is critical for designing efficient and durable optoelectronic devices. Here, we report that continuous light illumination leads to >1% contraction in the out-of-plane direction in two-dimensional hybrid perovskites, which is reversible and strongly dependent on the specific superlattice packing. X-ray photoelectron spectroscopy measurements show that constant light illumination results in the accumulation of positive charges in the terminal iodine atoms, thereby enhancing the bonding character of inter-slab I-I interactions across the organic barrier and activating out-of-plane contraction. Correlated charge transport, structural and photovoltaic measurements confirm that the onset of the light-induced contraction is synchronized to a threefold increase in carrier mobility and conductivity, which is consistent with an increase in the electronic band dispersion predicted by first-principles calculations. Flux-dependent space-charge-limited current measurement reveals that light-induced interlayer contraction activates interlayer charge transport. The enhanced charge transport boosts the photovoltaic efficiency of two-dimensional perovskite solar cells up to 18.3% by increasing the device's fill factor and open-circuit voltage.
Identifiants
pubmed: 34811551
doi: 10.1038/s41565-021-01010-2
pii: 10.1038/s41565-021-01010-2
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
45-52Subventions
Organisme : National Science Foundation (NSF)
ID : NSF 20-587
Organisme : National Science Foundation (NSF)
ID : #1724728
Organisme : National Science Foundation (NSF)
ID : 1724728
Organisme : United States Department of Defense | United States Navy | ONR | Office of Naval Research Global (ONR Global)
ID : N00014-20-1-2725
Organisme : U.S. Department of Energy (DOE)
ID : DE-SC0012704
Organisme : U.S. Department of Energy (DOE)
ID : DE-AC02-06CH11357
Organisme : United States Department of Defense | United States Navy | Office of Naval Research (ONR)
ID : N00014-20-1-2725
Informations de copyright
© 2021. The Author(s), under exclusive licence to Springer Nature Limited.
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