CsPb 0.9 Sn 0.1 IBr 2 Based All-Inorganic Perovskite Solar Cells with Exceptional Efficiency and Stability

The emergence of perovskite solar cells (PSCs) has generated enormous interest in the photovoltaic research community. Recently, cesium metal halides (CsMX3, M = Pb or Sn; X = I, Br, Cl or mixed halides) as a class of inorganic perovskites showed great promise for PSCs and other optoelectronic devices. However, CsMX3-based PSCs usually exhibit lower power conversion efficiencies (PCEs) than organic–inorganic hybrid PSCs, due to the unfavorable band gaps. Herein, a novel mixed-Pb/Sn mixed-halide inorganic perovskite, CsPb0.9Sn0.1IBr2, with a suitable band gap of 1.79 eV and an appropriate level of valence band maximum, was prepared in ambient atmosphere without a glovebox. After thoroughly eliminating labile…

• NN
  National Natural Science Foundation of China

  Awards: 21573108, 21403105
• MO
  Ministry of Education of the People's Republic of China

  Award: 020514380107
• MO
  Ministry of Science and Technology of the People's Republic of China

  Awards: 2016YFB0700600, 2017YFA0208200, 2015CB659300
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20160647