期刊
POLYMER CHEMISTRY
卷 6, 期 12, 页码 2312-2318出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4py01631a
关键词
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资金
- Victorian Organic Solar Cell Consortium
- Victorian State Government Department of Primary Industries (Energy Technology Innovation Strategy)
- Australian Renewable Energy Agency (ARENA) [2-A018]
- Australian Renewable Energy Agency (Australian Centre for Advanced Photovoltaics)
- Victorian State Government Department of Business Innovation (Victorian Science Agenda)
- Australian Research Council [FT130100500]
Donor-acceptor conjugated polymers with 2-(2-ethylhexyl)-3-hexyl thienyl substituted benzo[1,2-b:4,5-b'] dithiophene (BDT) as donor building block and 5,6-difluorobenzo[c][1,2,5] thiadiazole as acceptor building block have been synthesized by Stille coupling polymerization. The polymerization conditions were optimized to achieve high molecular weight polymers (number-average molecular weight, M-n, up to 139 kg mol(-1)). The molecular weight dependent polymer properties were studied and compared. Photovoltaic applications of the polymers in bulk heterojunction (BHJ) solar cells revealed that the power conversion efficiency increased significantly (from 0.9% to 4.1%) as the M-n increased from 10 kg mol(-1) to 73 kg mol(-1) while further increase of the molecular weight had less influence on the solar cell performance.
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