Diamine chelates for increased stability in mixed Sn–Pb and all-perovskite tandem solar cells

Li, Chongwen; Chen, Lei; Jiang, Fangyuan; Song, Zhaoning; Wang, Xiaoming; Balvanz, Adam; Ugur, Esma; Liu, Yuan; Liu, Cheng; Maxwell, Aidan; Chen, Hao; Liu, Yanjiang; Wang, Zaiwei; Xia, Pan; Li, You; Fu, Sheng; Sun, Nannan; Grice, Corey R.; Wu, Xuefei; Fink, Zachary; Hu, Qin; Zeng, Lewei; Jung, Euidae; Wang, Junke; Park, So Min; Luo, Deying; Chen, Cailing; Shen, Jie; Han, Yu; Perini, Carlo Riccardo; Correa-Baena, Juan-Pablo; Lu, Zheng-Hong; Russell, Thomas P.; De Wolf, Stefaan; Kanatzidis, Mercouri G.; Ginger, David S.; Chen, Bin; Yan, Yanfa; Sargent, Edward H.

doi:10.1038/s41560-024-01613-8

Diamine chelates for increased stability in mixed Sn–Pb and all-perovskite tandem solar cells

Journal Article · Thu Aug 15 00:00:00 EDT 2024 · Nature Energy

DOI:https://doi.org/10.1038/s41560-024-01613-8· OSTI ID:2434284

^[1]; Chen, Lei ^[2]; ^[3]; ^[2]; ^[2]; ^[4]; ^[5]; ^[4]; ^[4]; Maxwell, Aidan ^[6]; Chen, Hao ^[6]; Liu, Yanjiang ^[6]; ^[6]; Xia, Pan ^[6]; ^[2]; Fu, Sheng ^[2]; Sun, Nannan ^[2]; Grice, Corey R. ^[2]; Wu, Xuefei ^[7]; ^[8] more »

University of Toronto, Ontario (Canada); Northwestern University, Evanston, IL (United States)
University of Toledo, OH (United States)
University of Washington, Seattle, WA (United States)
Northwestern University, Evanston, IL (United States)
King Abdullah University of Science and Technology (KAUST), Thuwal (Saudi Arabia)
University of Toronto, Ontario (Canada)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of Massachusetts, Amherst, MA (United States)
KAUST, Thuwal (Saudi Arabia)
Georgia Institute of Technology, Atlanta, GA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of Massachusetts, Amherst, MA (United States); Tohoku University, Senda (Japan)

Perovskite tandem solar cells show promising performance but non-radiative recombination and its progressive worsening with time, especially in the mixed Sn–Pb low-bandgap layer, limit performance and stability. Here, in this study, we find that mixed Sn–Pb perovskite thin films exhibit a compositional gradient, with an excess of Sn on the surface – and we show this gradient exacerbates oxidation and increases the recombination rate. We find that diamines preferentially chelate Sn atoms, removing them from the film surface and achieving a more balanced Sn:Pb stoichiometry, making the surface of the film resistive to the oxidation of Sn. The process forms an electrically resistive low-dimensional barrier layer, passivating defects and reducing interface recombination. Further improving the homogeneity of the barrier layer using 1,2-diaminopropane results in more uniform distribution and passivation. Tandems achieve a power conversion efficiency of 28.8%. As a result, encapsulated tandems retain 90% of initial efficiency following 1000 hours of operating at the maximum power point under simulated one-sun illumination in air without cooling.

View Accepted Manuscript (DOE)

Research Organization:: University of Toledo, OH (United States)

Sponsoring Organization:: King Abdullah University of Science and Technology (KAUST); National Science Foundation (NSF); Office of Naval Research (ONR); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Hydrogen Fuel Cell Technologies Office (HFTO); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: AC02-05CH11231; EE0008753; EE0008837

OSTI ID:: 2434284

Journal Information:: Nature Energy, Journal Name: Nature Energy Vol. 9; ISSN 2058-7546

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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