Charge Carrier Dynamics in Perovskite Solar Cells Utilizing C60-SAM Passivated SnO2 Electron Selective Layer or Pb(SCN)2 Additive.

ORAL

Abstract

Photoluminescence measurement was performed to study the effect of various electron selective layers in MAPbI3 perovskite. We observed that significant improvement in electron extraction can be achieved by modifying MAPbI3/SnO2 interface with C60-SAM. Greater PL quenching was observed in MAPbI3/C60-SAM/SnO2/FTO than MAPbI3/SnO2/FTO. PL dynamics were found to be shortened in case of MAPbI3/C60-SAM/SnO2/FTO. These results revealed that photogenerated electrons are extracted at faster rate in MAPbI3/C60-SAM/SnO2/FTO and thereby improving the cell performance. In a separate system, Cs incorporation in FAPbI3 has been found to suppress formation of yellow phase that improves thermal stability of FA1-xCsxPbI3. Enhanced grain size and higher intrinsic photogenerated carrier life time was correlated with the use of Pb(SCN)2 as an additive in FA1-xCsxPbI3, and incorporation of Pb(SCN)2 enabled improved power conversion efficiency.

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Authors

  • Niraj Shrestha

    • University of Toledo
    • university of toledo

  • Changlei Wang

    • University of Toledo

  • Yue Yu

    • University of Toledo

  • Corey Grice

    • University of Toledo

  • Weiqiang Liao

    • University of Toledo

  • Alexander Cimaroli

    • University of Toledo

  • Jing Chen

    • Southeast University

  • Dewei Zhao

    • University of Toledo

  • Zhenhua Yu

    • Wuhan University

  • Pei Liu

    • Wuhan University

  • Nian Cheng

    • Wuhan University

  • Xingzhong Zhao

    • Wuhan University

  • Khagendra Bhandari

    • University of Toledo

  • Paul Roland

    • University of Toledo

  • Yanfa Yan

    • University of Toledo

  • Randall Ellingson

    • University of Toledo