Modulation of donor-acceptor interface through thermal treatment for efficient bilayer organic solar cells

Dhananjaya Kekuda, Jen Hsien Huang, Kuo Chuan Ho, Chih Wei Chu

Research output: Contribution to journalArticle

38 Citations (Scopus)


In this article, we demonstrate the effect of donor-acceptor (D-A) interface on the performance of bilayer organic solar cells. Solution processing was used to develop liquid crystal poly(9, 9′-dioctylfluorene- cobithiophene) (F8T2) polymer films and variable morphology of the films was achieved by varying the annealing temperature. The morphology of the annealed active layers signature a well-aligned nanodomain feature with an interdegitated structure at 200 °C. The devices with bilayer configuration, ITO/PEDOT:PSS/F8T2/C70/Al, have yielded a power conversion efficiency (PCE) of 3.4(±0.2)% under 1 sun incident radiation. We attribute the high PCE to the increased D-A junction interface and balanced charge transport between electron/hole transport layers.

Original languageEnglish
Pages (from-to)2764-2768
Number of pages5
JournalJournal of Physical Chemistry C
Issue number6
Publication statusPublished - 18-02-2010


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

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