Fabrication of Efficient Low-Bandgap Perovskite Solar Cells by Combining Formamidinium Tin Iodide with Methylammonium Lead Iodide

Year: 2016

Type: article

Abstract: 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.

Source: Journal of the American Chemical Society

DOI: 10.1021/jacs.6b08337

Authors: Weiqiang Liao, Dewei Zhao, Yue Yu, Niraj Shrestha, Kiran Ghimire, Corey R. Grice, Changlei Wang, Yuqing Xiao, Alexander J. Cimaroli, Randy J. Ellingson, Nikolas J. Podraza, Kai Zhu, Ren-Gen Xiong, Yanfa Yan

Institutions: Southeast University, University of Toledo, Wuhan University, National Laboratory of the Rockies

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, Ohio Department of Development, Ohio Board of Regents, National Natural Science Foundation of China, Southeast University, Office of Science, Office of Energy Efficiency and Renewable Energy, Division of Materials Research, Division of Chemistry

OpenAlex ID: W2519346103