Journal
MACROMOLECULES
Volume 41, Issue 20, Pages 7485-7489Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma801368z
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Funding
- National Science Council of Taiwan [NSC 97-2221-E-110-008, NSC 96-2622-E-110-004]
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Poly(3-hexylthiophene) formed gels and showed liquid crystalline structures at high concentrations. The absorption properties of poly(3-hexylthiophene) showed dramatic changes during gelation, which is an indication of strong intermolecular pi-electronic coupling of the ordered self-assenibled poly(3-hexylthiophene) gels. The effect of conformational transitions oil the photovoltaic properties of solution-processed poly(3-hexylthiophene)/fullerene blends has been Studied in this Article. It is shown that the photovoltaic performance is strongly affected by gelation, which afters the morphology of the photoactive layer. Device optimization yields solar cells with a power conversion efficiency of 3.78% under standard test conditions (AM 1.5. 100 mW/cm(2)).
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