Nanoscale localized contacts for high fill factors in polymer-passivated perovskite solar cells.
Journal
Science (New York, N.Y.)
ISSN: 1095-9203
Titre abrégé: Science
Pays: United States
ID NLM: 0404511
Informations de publication
Date de publication:
22 01 2021
22 01 2021
Historique:
received:
24
03
2020
revised:
18
10
2020
accepted:
10
12
2020
entrez:
22
1
2021
pubmed:
23
1
2021
medline:
23
1
2021
Statut:
ppublish
Résumé
Polymer passivation layers can improve the open-circuit voltage of perovskite solar cells when inserted at the perovskite-charge transport layer interfaces. Unfortunately, many such layers are poor conductors, leading to a trade-off between passivation quality (voltage) and series resistance (fill factor, FF). Here, we introduce a nanopatterned electron transport layer that overcomes this trade-off by modifying the spatial distribution of the passivation layer to form nanoscale localized charge transport pathways through an otherwise passivated interface, thereby providing both effective passivation and excellent charge extraction. By combining the nanopatterned electron transport layer with a dopant-free hole transport layer, we achieved a certified power conversion efficiency of 21.6% for a 1-square-centimeter cell with FF of 0.839, and demonstrate an encapsulated cell that retains ~91.7% of its initial efficiency after 1000 hours of damp heat exposure.
Identifiants
pubmed: 33479151
pii: 371/6527/390
doi: 10.1126/science.abb8687
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
390-395Informations de copyright
Copyright © 2021, American Association for the Advancement of Science.