High-efficiency inverted dithienogermole-thienopyrrolodione-based polymer solar cells

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Cephas E. Small
  • Song Chen
  • Jegadesan Subbiah
  • Chad M. Amb
  • Tzung-Han Lai
  • John R. Reynolds
  • Franky So

Detail(s)

Original languageEnglish
Pages (from-to)115-120
Journal / PublicationNature Photonics
Volume6
Issue number2
Publication statusPublished - Feb 2012
Externally publishedYes

Abstract

Inverted polymer bulk heterojunction solar cells have received a great deal of attention because of their compatibility with large-scale roll-to-roll processing. The inverted cell geometry has the following structure: substrate (rigid or flexible)/indium tin oxide/electron-transporting layer/photoactive layer/hole-transporting layer/top anode. Solution-processed metal-oxide films, based on materials such as ZnO and TiO2, are typically used as the electron-transporting layers. Here, we demonstrate enhanced charge collection in inverted polymer solar cells using a surface-modified ZnO-polymer nanocomposite electron-transporting layer. Using this approach, we demonstrate inverted polymer solar cells based on a low-bandgap polymer with an alternating dithienogermole-thienopyrrolodione repeat unit (PDTG-TPD) with certified power conversion efficiencies of 7.4%. To our knowledge, this is the highest efficiency reported to date for polymer solar cells with a device architecture compatible with the roll-to-roll process. © 2012 Macmillan Publishers Limited. All rights reserved.

Citation Format(s)

High-efficiency inverted dithienogermole-thienopyrrolodione-based polymer solar cells. / Small, Cephas E.; Chen, Song; Subbiah, Jegadesan et al.
In: Nature Photonics, Vol. 6, No. 2, 02.2012, p. 115-120.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review