Graded bulk-heterojunction enables 17% binary organic solar cells via nonhalogenated open air coating.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
10 Aug 2021
10 Aug 2021
Historique:
received:
08
02
2021
accepted:
26
07
2021
entrez:
11
8
2021
pubmed:
12
8
2021
medline:
12
8
2021
Statut:
epublish
Résumé
Graded bulk-heterojunction (G-BHJ) with well-defined vertical phase separation has potential to surpass classical BHJ in organic solar cells (OSCs). In this work, an effective G-BHJ strategy via nonhalogenated solvent sequential deposition is demonstrated using nonfullerene acceptor (NFA) OSCs. Spin-coated G-BHJ OSCs deliver an outstanding 17.48% power conversion efficiency (PCE). Depth-profiling X-ray photoelectron spectroscopy (DP-XPS) and angle-dependent grazing incidence X-ray diffraction (GI-XRD) techniques enable the visualization of polymer/NFA composition and crystallinity gradient distributions, which benefit charge transport, and enable outstanding thick OSC PCEs (16.25% for 300 nm, 14.37% for 500 nm), which are among the highest reported. Moreover, the nonhalogenated solvent enabled G-BHJ OSC via open-air blade coating and achieved a record 16.77% PCE. The blade-coated G-BHJ has drastically different D-A crystallization kinetics, which suppresses the excessive aggregation induced unfavorable phase separation in BHJ. All these make G-BHJ a feasible and promising strategy towards highly efficient, eco- and manufacture friendly OSCs.
Identifiants
pubmed: 34376697
doi: 10.1038/s41467-021-25148-8
pii: 10.1038/s41467-021-25148-8
pmc: PMC8355148
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4815Subventions
Organisme : Research Grants Council, University Grants Committee (RGC, UGC)
ID : 14314216
Organisme : Research Grants Council, University Grants Committee (RGC, UGC)
ID : GRF 15218517, CRF C5037-18G, PDFS2021-5S04
Organisme : Shenzhen Science and Technology Innovation Commission
ID : JCYJ 20200109105003940
Informations de copyright
© 2021. The Author(s).
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