Abstract
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 language | English |
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Pages (from-to) | 2764-2768 |
Number of pages | 5 |
Journal | Journal of Physical Chemistry C |
Volume | 114 |
Issue number | 6 |
DOIs | |
Publication status | Published - 18-02-2010 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Surfaces, Coatings and Films
- Physical and Theoretical Chemistry