Perovskite Solar Cells with Enhanced Fill Factors Using Polymer-Capped Solvent Annealing

Kong, Jaemin; Wang, Hanyu; Röhr, Jason A.; Fishman, Zachary S.; Zhou, Yuanyuan; Li, Mingxing; Cotlet, Mircea; Kim, Geunjin; Karpovich, Christopher; Antonio, Francisco; Padture, Nitin P.; Taylor, André D.

doi:10.1021/acsaem.0c00854

Perovskite Solar Cells with Enhanced Fill Factors Using Polymer-Capped Solvent Annealing

Journal Article · Thu Jul 23 00:00:00 EDT 2020 · ACS Applied Energy Materials

DOI:https://doi.org/10.1021/acsaem.0c00854· OSTI ID:1657160

^[1]; ^[2]; Röhr, Jason A. ^[3]; Fishman, Zachary S. ^[2]; Zhou, Yuanyuan ^[4]; Li, Mingxing ^[5]; ^[5]; Kim, Geunjin ^[6]; Karpovich, Christopher ^[2]; Antonio, Francisco ^[2]; ^[4]; ^[1]

New York Univ. (NYU), NY (United States); Yale Univ., New Haven, CT (United States)
Yale Univ., New Haven, CT (United States)
New York Univ. (NYU), NY (United States)
Brown Univ., Providence, RI (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Korea Research Inst. of Chemistry Technology (KRICT), Daejeon (Korea, Republic of)

Despite huge improvements in power conversion efficiencies of perovskite solar cells, the technology is still limited by fill factors at around 80%. In this work, we report perovskite solar cells having exceptionally high fill factors of 85% and enhanced open-circuit voltage without sacrificing short-circuit current through a polymer-capped solvent-annealing process assisted by a hot air blower. Additionally, during the solvent-annealing, the perovskite surface flattens and the perovskite grains agglomerate into micrometer-sized clusters having enlarged α-phase crystallites, while the δ-phase simultaneously disappears. The optimized structure reduces energetic disorder and trap-assisted recombination in the perovskite layer, resulting in an enhanced efficiency from 18.2% to 19.8% and improved device lifetime. Our results provide a pathway to increase the device efficiency and stability of perovskite solar cells, and have the potential to stimulate research on scalable poly-crystal perovskite layer fabrication in optoelectronic devices.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704

OSTI ID:: 1657160

Report Number(s):: BNL--216333-2020-JAAM

Journal Information:: ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 8 Vol. 3; ISSN 2574-0962

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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77 NANOSCIENCE AND NANOTECHNOLOGY
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perovskite solar cells
polymer-capped solvent annealing

Perovskite Solar Cells with Enhanced Fill Factors Using Polymer-Capped Solvent Annealing

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