Stable perovskite solar cells with efficiency exceeding 24.8% and 0.3-V voltage loss

Further improvement and stabilization of perovskite solar cell (PSC) performance are essential to achieve the commercial viability of next-generation photovoltaics. Considering the benefits of fluorination to conjugated materials for energy levels, hydrophobicity, and noncovalent interactions, two fluorinated isomeric analogs of the well-known hole-transporting material (HTM) Spiro-OMeTAD are developed and used as HTMs in PSCs. The structure-property relationship induced by constitutional isomerism is investigated through experimental, atomistic, and theoretical analyses, and the fabricated PSCs feature high efficiency up to 24.82% (certified at 24.64% with 0.3-volt voltage loss), along with long-term…

• UN
  Ulsan National Institute of Science and Technology

  Award: 1.200042
• MO
  Ministry of Science, ICT and Future Planning

  Awards: 2020M1A2A2080746, 2012M3A6A5055225
• KI
  Korea Institute of Energy Research

  Awards: C0-2402, C0-2401
• KI
  Korea Institute of Science and Technology Information

  Award: KSC-2019-CRE-0056
• NR
  National Research Foundation of Korea

  Awards: 2014R1A5A1009799, 2018R1A2A1A05077194
• KI
  Korea Institute of Energy Technology Evaluation and Planning

  Award: 20193091010460
• KW
  KAIST Wearable Platform Material Technology Center

  Award: 2016R1A5A1009926