Facile synthesis and photovoltaic applications of a new alkylated bismethano fullerene as electron acceptor for high open circuit voltage solar cells

D. Baran, S. Erten-Ela, A. Kratzer, T. Ameri, C.J. Brabec, A. Hirsch

Research output: Contribution to journalArticlepeer-review

Abstract

It is crucial to control the lowest unoccupied molecular orbital (LUMO) of electron accepting materials for producing efficient charge transfer in bulk heterojunction (BHJ) solar cells. Due to their high LUMO level, soluble bis-adducts of C60 are of high interest for improving the Voc in BHJ solar cells. In this work, we have developed a novel bis-4-propylpentyl[6,6]methanofullerene bis-adduct, NCBA, using a alkyl solubilizing group. The optoelectronic, electrochemical and photovoltaic properties of this bis-product are investigated. NCBA is successfully applied as the electron acceptor with poly(3-hexylthiophene) (P3HT) in a BHJ solar cell showing a high Voc of 0.73 V. © The Royal Society of Chemistry 2015.
Original languageEnglish
Pages (from-to)64724-64730
Number of pages7
JournalRSC Advances
Volume5
Issue number79
DOIs
Publication statusPublished - 2015

Keywords

  • Charge transfer
  • Heterojunctions
  • Molecular orbitals
  • Open circuit voltage
  • Solar power generation
  • Bulk heterojunction (BHJ)
  • Electron acceptor
  • Electron-accepting
  • Lowest unoccupied molecular orbital
  • Methanofullerenes
  • Photovoltaic applications
  • Photovoltaic property
  • Poly-3-hexylthiophene
  • Solar cells

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