Efficient and Stable Ideal Bandgap Perovskite Solar Cell Achieved by a Small Amount of Tin Substituted Methylammonium Lead Iodide

Yongqi Yin, Sufang Fu, Sheng Zhou, Yuling Song, Lin Li, Mingyi Zhang, Jie Wang, Pandiyarajan Mariyappan, Saad M. Alshehri, Tansir Ahamad, Yusuke Yamauchi

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: Ideal bandgap ~ 1.4 eV of lead–tin (Pd–Sn) organic–inorganic hybrid perovskite absorber is essential to further enhance the power conversion efficiency of perovskite solar cells (PVSCs). However, due to the facile oxidation of Sn2+, large amount of Sn substituted Pb based PVSCs suffer with low stability in ambient environment. In this work, we realize an ideal bandgap perovskite by introducing a small amount (10 mol%) of Sn2+ to methylammonium lead iodide (MAPbI3). A large grain size MAPb0.9Sn0.1I3 films with strong absorbance can be obtained. As a result, the best performance up to 18.3% efficiency is achieved. Importantly, the MAPb0.9Sn0.1I3 cell retains 90% of its performance after operation at the maximum power point under full 1-sun illumination for 500 h, in contrast to the quick degradation of MAPbI3 cell. This study demonstrates the promising potential of stable and efficient ideal band-gap Pb–Sn PVSCs. Graphic Abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)224-230
Number of pages7
JournalElectronic Materials Letters
Volume16
Issue number3
DOIs
Publication statusPublished - 2020 May 1
Externally publishedYes

Keywords

  • Efficiency
  • Ideal bandgap
  • Pb–Sn hybrid perovskite
  • Perovskite solar cell
  • Stability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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