Indium tin oxide-free small molecule organic solar cells using single-walled carbon nanotube electrodes

Research output: Contribution to journalArticleScientificpeer-review


  • Clément Delacou
  • Il Jeon
  • Seungju Seo
  • Takafumi Nakagawa
  • Esko I. Kauppinen
  • Shigeo Maruyama
  • Yutaka Matsuo

Research units

  • University of Tokyo
  • National Institute of Advanced Industrial Science and Technology
  • University of Science and Technology of China


We demonstrated single-walled carbon nanotubes (SWNTs) electrode-based small molecule organic solar cells (OSCs) using diketopyrrolopyrrole donor, DPP(TBFu)2 as an electron donor with [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) as an electron acceptor. SWNT films with 60% transmittance (at 550 nm) were dry-transferred onto glass substrates to replace conventional indium tin oxide (ITO) electrodes. In order to improve the conductivity of the SWNT electrodes, MoOx thermal doping was applied followed by spin coating of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) to enhance doping and electrode blocking function. The indium-free devices showed a power conversion efficiency (PCE) of 1.00% while ITO-based devices showed a PCE of 3.79%.


Original languageEnglish
Pages (from-to)M3181-M3184
JournalECS Journal of Solid State Science and Technology
Issue number6
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

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