Employing Lead Thiocyanate Additive to Reduce the Hysteresis and Boost the Fill Factor of Planar Perovskite Solar Cells

Weijun Ke; Chuanxiao Xiao; Changlei Wang; Bayrammurad Saparov; Hsin-Sheng Duan; Dewei Zhao; Zewen Xiao; Philip Schulz; Steven P Harvey; Weiqiang Liao; Weiwei Meng; Yue Yu; Alexander J Cimaroli; Chun-Sheng Jiang; Kai Zhu; Mowafak Al-Jassim; Guojia Fang; David B Mitzi; Yanfa Yan

doi:10.1002/adma.201600594

Employing Lead Thiocyanate Additive to Reduce the Hysteresis and Boost the Fill Factor of Planar Perovskite Solar Cells

Adv Mater. 2016 Jul;28(26):5214-21. doi: 10.1002/adma.201600594. Epub 2016 May 4.

Authors

Weijun Ke^{1

2

3}, Chuanxiao Xiao³, Changlei Wang¹, Bayrammurad Saparov^{4

5}, Hsin-Sheng Duan⁴, Dewei Zhao^{1

3}, Zewen Xiao¹, Philip Schulz³, Steven P Harvey³, Weiqiang Liao¹, Weiwei Meng¹, Yue Yu¹, Alexander J Cimaroli¹, Chun-Sheng Jiang³, Kai Zhu³, Mowafak Al-Jassim³, Guojia Fang², David B Mitzi^{4

5}, 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 Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, China.
³ National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA.
⁴ Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.
⁵ Department of Chemistry, Duke University, Durham, NC, 27708, USA.

PMID: 27145346
DOI: 10.1002/adma.201600594

Abstract

Lead thiocyanate in the perovskite precursor can increase the grain size of a perovskite thin film and reduce the conductivity of the grain boundaries, leading to perovskite solar cells with reduced hysteresis and enhanced fill factor. A planar perovskite solar cell with grain boundary and interface passivation achieves a steady-state efficiency of 18.42%.

Keywords: grain boundary passivation; hysteresis; interface passivation; perovskite solar cells.