Dialkoxymethano[60]fullerenes as electron acceptors in thin-film organic solar cells

Mohammed Y. Suleiman, Yue Ma, Takafumi Nakagawa, Hiroshi Ueno, Yutaka Matsuo

Research output: Contribution to journalArticlepeer-review


This study presents the synthesis, characterization, and electrochemical properties of four new dialkoxymethanofullerenes, as well as their performance in organic solar cells (OSCs) devices. Dialkoxymethanofullerenes were synthesized in 27%–32% yield by thermolysis of dialkoxyoxadiazolines and reaction with C60 under reflux in toluene. The prepared compounds were then characterized and used for the first time as electron-acceptor materials in thin-film bulk heterojunction OSCs with PBTZT-stat-BDTT-8 as the electron donor material. The devices made with ethoxy-hexyloxymethanofullerene and methoxy-hexyloxymethanofullerene exhibited optimal power conversion efficiencies (PCEs) of 3.79% and 4.65%, with open-circuit voltage of 0.832 and 0.831 V, respectively. In contrast, the devices made with ethoxy-ethoxymethanofullerene and methoxy-ethoxymethanofullerene exhibited very low PCEs of <0.01% for both, indicating a large impact of the substituents on device performance.

Original languageEnglish
Article number130514
Issue number38
Publication statusPublished - 2019 Sep 20
Externally publishedYes


  • Dialkoxymethanofullerenes
  • Dialkoxyoxadiazolines
  • Methanofullerene
  • Organic photovoltaics
  • Organic solar cells

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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