Methylthio Substituent in SAM Constructing Regulatory Bridge with Photovoltaic Perovskites

Chen C., Liu G., Chen X., DEĞER C., Jin R., Wang K., ...Daha Fazla

Angewandte Chemie - International Edition, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1002/anie.202419375
  • Dergi Adı: Angewandte Chemie - International Edition
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, L'Année philologique, Agricultural & Environmental Science Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Chemical Abstracts Core, Chimica, Compendex, EMBASE, Veterinary Science Database, Nature Index
  • Anahtar Kelimeler: Inverted perovskite photovoltaics, MeS−CbzPh, Methylthio group, Self-assembled monolayer
  • Marmara Üniversitesi Adresli: Evet

Özet

Inverted (p-i-n) perovskite solar cells (PSCs) have experienced remarkable advancements in recent years, which is largely attributed to the development of novel hole-transport layer (HTL) self-assembled monolayer (SAM) materials. Methoxy (MeO−) groups are typically introduced into SAM materials to enhance their wettability and effectively passivate the perovskite buried interface. However, MeO-based SAM materials exhibit a mismatch in highest occupied molecular orbital (HOMO) levels with perovskite layer due to the strong electron-donating capability of methoxy group. In this work, we introduced a methylthio (MeS−) substituent that is superior to methoxy as a highly versatile self-assembled molecular design strategy. As a soft base, sulfur atom forms a stronger Pb−S bond than oxygen. Additionally, within the CbzPh series of SAM materials, MeS−CbzPh demonstrates a more optimal HOMO level and enhanced hole transport properties. Consequently, the MeS−CbzPh HTL based device achieved an impressive power conversion efficiency (PCE) of 26.01 % and demonstrated high stability, retaining 93.3 % efficiency after 1000 hours of maximum power point tracking (MPPT). Moreover, in comparison with the commonly used 4PACz-based SAM molecular series, MeS-4PACz also exhibited the best performance among its peers. Our work provides valuable insights for the molecular design of SAM materials, offering a highly versatile functional substituent group.