Monocyclopropanated fullerene derivatives with decreased electron affinity as promising electron acceptor materials for organic solar cells

Alexander V. Mumyatov, Andrey E. Goryachev, Fedor A. Prudnov, Olga A. Mukhacheva, Diana K. Sagdullina, Alexander V. Chernyak, Sergey I. Troyanov, Pavel A. Troshin

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Monocyclopropanated fullerene derivatives with decreased electron affinity as compared to standard [60]PCBM acceptor were synthesized, characterized, and investigated as promising electron acceptor materials for fullerene-based organic solar cells. This decrease in electron affinity was attributed to the presence of through-space electronic interactions between the lone electron pairs of oxygen atoms and electron-deficient π-system of the fullerene cage. Organic bulk heterojunction solar cells based on the designed materials blended with conjugated polymers P3HT and PCDTBT have demonstrated spectacular increase in open-circuit voltage by >100 mV and improved light power conversion efficiency as compared to the reference devices comprising [60]PCBM. The application of new fullerene-based acceptor materials in combination with the promising low band gap conjugated copolymer may deliver competitive device performances.

Original languageEnglish
Article number116565
JournalSynthetic Metals
Volume270
DOIs
Publication statusPublished - Dec 2020

Keywords

  • Monocyclopropanated fullerene derivatives
  • N-type semiconductors
  • Open-circuit voltage
  • Organic solar cell
  • [3+2]cycloaddition of diazo compounds

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