Tuning carrier concentration of SnO2 quantum dot electron transport layers for high-performance planar perovskite solar cells

ORAL

Abstract

Organic-inorganic lead halide perovskite solar cells (PSCs) have shown great potential due to rapid development in power conversion efficiency, which has surpassed 23%. The quality of the electron transport layers (ETLs) and hole transport layers can significantly affect the performance of PSCs. Tin Oxide (SnO2) commonly employed in planar PSCs is a promising material as ETLs. Herein, we facilely synthesize colloidal SnO2 quantum dots (QDs) at room temperature and control the carrier concentration of SnO2 QD ETLs at different annealing temperature to achieve high performance PSCs. By optimizing the electron density of SnO2 QD ETLs, we can achieve a champion stabilized power output of 20.32% for the planar PSCs using triple cation perovskite absorber and 19.73% for those using CH3NH3PbI3-based system. Our results demonstrate the promise of carrier concentration-controlled SnO2 QD ETLs for fabricating stable, efficient and reproducible planar PSCs.

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Presenters

  • Cong Chen

    Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Key Laboratory of Artifcial Micro- and Nan

Authors

  • Cong Chen

    Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Key Laboratory of Artifcial Micro- and Nan

  • Guojia Fang

    Wuhan University, Key Laboratory of Artifcial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University

  • Yanfa Yan

    The University of Toledo, Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Wright Ctr for Photovoltaics Innovation and Commercialization, Sch. for Solar and Adv. Energy, Dept of Physics and Astronomy, Univ of Toledo, Department of Physics and Astronomy, The Wright Center for Photovoltaics Innovation and Commercialization (PVIC), University of Toledo, Toledo OH 43606, USA.