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Fabrication and Characterization of Bulk Heterojunction Solar Cells Based on Liquid-Crystal Semiconductive Polymer
Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
- 1 Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
- 2 Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
- 3 Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
- 4 Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
Energy and Power Engineering·Volume 04 (2012)·Pages 459–464·Published 22 November 2012·DOI10.4236/epe.2012.46060
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Abstract
Bulk heterojunction solar cells based on poly poly(9,9-dioctylfluorene-co-bithiophene) (F8T2) as liquid crystal semiconductive polymer and C 60 as electron acceptor were fabricated and characterized. Thermal treatment of the bulk heterojunction films at annealing in the range of glass temperature and liquid crystal transition was performed for tuning optimization with improving the photovoltaic and optical properties. The photovoltaic performance was depended on morphological behavior in active layer at crystal state below glass temperature. The F8T2 thin film worked for electron-donor layer as p-type semiconductor to support charge transfer in active layer. Mechanisms of the photovoltaic properties were discussed on the basis of experimental results.
KeywordsLiquid Crystal PolymerBulk Heterojunction Solar CellPhotovoltaic PropertyOptical Property
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