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3,6-Carbazole incorporated into Poly[9,9-Dioctylfluorene-alt-(Bisthienyl)-Benzothiadiazole]s Improving the Power Conversion Efficiency SCIE SCOPUS
- Title
- 3,6-Carbazole incorporated into Poly[9,9-Dioctylfluorene-alt-(Bisthienyl)-Benzothiadiazole]s Improving the Power Conversion Efficiency
- Authors
- Yuanhe Fu; Hyojung Cha; Gang-Young Lee; Byung Joon Moon; Park, CE; Park, T
- Date Issued
- 2012-04-10
- Publisher
- American Chemical Society
- Abstract
- A novel concept of D-A-type copolymers based on fluorene polymer incorporated with 3,6-carbazole unit enhances the device performance for organic photovoltaic cells. P(F45C5-DTBT), incorporating 5 mol % 3,6-carbazole into P(2,7F-DTBT), shows an almost 2-fold improvement (5.1%) in power conversion efficiency relative to P(2,7F-DTBT) (2.6%). This results is ascribed to the good balance between electron and hole mobilities in the devices (mu(e)/mu(h) similar to 1.8 for P(F45C5-DTBT) vs 152 for P(2,7F-DTBT)), and the formation of a nanoscale morphology in the blend of the copolymer and [6,6]-phenyl C71-butyric acid methyl ester (PC71BM).
- Keywords
- HETEROJUNCTION SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; POLYMER; POLYFLUORENES; PERFORMANCE; DEPENDENCE; MORPHOLOGY; COPOLYMER; PROGRESS
- ISSN
- 0024-9297
- Article Type
- Article
- Citation
- MACROMOLECULES, vol. 45, no. 7, page. 3004 - 3009, 2012-04-10
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