Fabrication of Efficient Low-Bandgap Perovskite Solar Cells by Combining Formamidinium Tin Iodide with Methylammonium Lead Iodide.
Mixed tin (Sn)-lead (Pb) perovskites with high Sn content exhibit low bandgaps suitable for fabricating the bottom cell of perovskite-based tandem solar cells. In this work, we report on the fabrication of efficient mixed Sn-Pb perovskite solar cells using precursors combining formamidinium tin iodide (FASnI3) and methylammonium lead iodide (MAPbI3). The best-performing cell fabricated using a (FASnI3)0.6(MAPbI3)0.4 absorber with an absorption edge of ∼1.2 eV achieved a power conversion efficiency (PCE) of 15.08 (15.00)% with an open-circuit voltage of 0.795 (0.799) V, a short-circuit current density of 26.86(26.82) mA/cm(2), and a fill factor of 70.6(70.0)% when measured under forward (reverse) voltage scan. The average PCE of 50 cells we have fabricated is 14.39 ± 0.33%, indicating good reproducibility.
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.|Ordered Matter Science Research Center, Southeast University , Nanjing 211189, China.
Weiqiang
W
Liao
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Dewei
D
Zhao
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Yue
Y
Yu
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Niraj
N
Shrestha
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Kiran
K
Ghimire
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Corey R
CR
Grice
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.|Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education, School of Physics and Technology, Wuhan University , Wuhan 430072, China.
Changlei
C
Wang
Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education, School of Physics and Technology, Wuhan University , Wuhan 430072, China.
Yuqing
Y
Xiao
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Alexander J
AJ
Cimaroli
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Randy J
RJ
Ellingson
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Nikolas J
NJ
Podraza
Chemistry and Nanoscience Center, National Renewable Energy Laboratory , Golden, Colorado 80401, United States.
Kai
K
Zhu
Ordered Matter Science Research Center, Southeast University , Nanjing 211189, China.
Ren-Gen
RG
Xiong
Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Yanfa
Y
Yan