Lead-Free Inverted Planar Formamidinium Tin Triiodide Perovskite Solar Cells Achieving Power Conversion Efficiencies up to 6.22

Weiqiang Liao; Dewei Zhao; Yue Yu; Corey R Grice; Changlei Wang; Alexander J Cimaroli; Philip Schulz; Weiwei Meng; Kai Zhu; Ren-Gen Xiong; Yanfa Yan

doi:10.1002/adma.201602992

Lead-Free Inverted Planar Formamidinium Tin Triiodide Perovskite Solar Cells Achieving Power Conversion Efficiencies up to 6.22

Adv Mater. 2016 Nov;28(42):9333-9340. doi: 10.1002/adma.201602992. Epub 2016 Aug 29.

Authors

Weiqiang Liao^{1

2}, Dewei Zhao¹, Yue Yu¹, Corey R Grice¹, Changlei Wang¹, Alexander J Cimaroli¹, Philip Schulz³, Weiwei Meng¹, Kai Zhu³, Ren-Gen Xiong², Yanfa Yan¹

Affiliations

¹ Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, 43606, USA.
² Ordered Matter Science Research Center, Southeast University, Nanjing, 211189, P. R. China.
³ Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, 80401, USA.

PMID: 27571446
DOI: 10.1002/adma.201602992

Abstract

Efficient lead (Pb)-free inverted planar formamidinium tin triiodide (FASnI₃ ) perovskite solar cells (PVSCs) are demonstrated. Our FASnI₃ PVSCs achieved average power conversion efficiencies (PCEs) of 5.41% ± 0.46% and a maximum PCE of 6.22% under forward voltage scan. The PVSCs exhibit small photocurrent-voltage hysteresis and high reproducibility. The champion cell shows a steady-state efficiency of ≈6.00% for over 100 s.

Keywords: SnF2 additives; lead-free, perovskite solar cells; pinhole-free; uniform perovskites.