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Regulating surface potential maximizes voltage in all-perovskite tandems.
Chen, Hao; Maxwell, Aidan; Li, Chongwen; Teale, Sam; Chen, Bin; Zhu, Tong; Ugur, Esma; Harrison, George; Grater, Luke; Wang, Junke; Wang, Zaiwei; Zeng, Lewei; Park, So Min; Chen, Lei; Serles, Peter; Awni, Rasha Abbas; Subedi, Biwas; Zheng, Xiaopeng; Xiao, Chuanxiao; Podraza, Nikolas J; Filleter, Tobin; Liu, Cheng; Yang, Yi; Luther, Joseph M; De Wolf, Stefaan; Kanatzidis, Mercouri G; Yan, Yanfa; Sargent, Edward H.
Affiliation
  • Chen H; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Maxwell A; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Li C; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Teale S; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, USA.
  • Chen B; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Zhu T; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Ugur E; Department of Chemistry, Northwestern University, Evanston, IL, USA.
  • Harrison G; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Grater L; KAUST Solar Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia.
  • Wang J; KAUST Solar Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia.
  • Wang Z; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Zeng L; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Park SM; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Chen L; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Serles P; The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Awni RA; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, USA.
  • Subedi B; Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Zheng X; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, USA.
  • Xiao C; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, USA.
  • Podraza NJ; National Renewable Energy Laboratory, Golden, CO, USA.
  • Filleter T; National Renewable Energy Laboratory, Golden, CO, USA.
  • Liu C; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, USA.
  • Yang Y; Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada.
  • Luther JM; Department of Chemistry, Northwestern University, Evanston, IL, USA.
  • De Wolf S; Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA.
  • Kanatzidis MG; Department of Chemistry, Northwestern University, Evanston, IL, USA.
  • Yan Y; Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA.
  • Sargent EH; National Renewable Energy Laboratory, Golden, CO, USA.
Nature ; 613(7945): 676-681, 2023 01.
Article in En | MEDLINE | ID: mdl-36379225
The open-circuit voltage (VOC) deficit in perovskite solar cells is greater in wide-bandgap (over 1.7 eV) cells than in perovskites of roughly 1.5 eV (refs. 1,2). Quasi-Fermi-level-splitting measurements show VOC-limiting recombination at the electron-transport-layer contact3-5. This, we find, stems from inhomogeneous surface potential and poor perovskite-electron transport layer energetic alignment. Common monoammonium surface treatments fail to address this; as an alternative, we introduce diammonium molecules to modify perovskite surface states and achieve a more uniform spatial distribution of surface potential. Using 1,3-propane diammonium, quasi-Fermi-level splitting increases by 90 meV, enabling 1.79 eV perovskite solar cells with a certified 1.33 V VOC and over 19% power conversion efficiency (PCE). Incorporating this layer into a monolithic all-perovskite tandem, we report a record VOC of 2.19 V (89% of the detailed balance VOC limit) and over 27% PCE (26.3% certified quasi-steady state). These tandems retained more than 86% of their initial PCE after 500 h of operation.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nature Year: 2023 Document type: Article Affiliation country: Canada Country of publication: United kingdom
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nature Year: 2023 Document type: Article Affiliation country: Canada Country of publication: United kingdom