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题名:
Novel donor-acceptor polymers containing o-fluoro-p-alkoxyphenyl-substituted benzo[1,2-b:4,5-b ']dithiophene units for polymer solar cells with power conversion efficiency exceeding 9%
作者: Wang, N; Chen, WC; Shen, WF; Duan, LR; Qiu, M; Wang, JY; Yang, CM; Du, ZK; Yang, RQ
刊名: JOURNAL OF MATERIALS CHEMISTRY A
出版日期: 2016
卷号: 4, 期号:26, 页码:10212-10222
DOI: 10.1039/c6ta03709g
通讯作者: Yang, RQ (reprint author), Chinese Acad Sci, CAS Key Lab Biobased Mat, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China. ; Yang, RQ (reprint author), S China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Guangdong, Peoples R China.
文章类型: 期刊论文
英文摘要: In this work, a new electron-rich building block, o-fluoro-p-alkoxyphenyl-substituted benzo[1,2-b:4,5-b'] dithiophene (BDT) unit, has been used to construct donor (D)-acceptor (A) conjugated copolymers with electron-deficient units 5,6-difluoro-4,7-di(4-(2-ethylhexyl)-2-thienyl)-2,1,3-benzothiadiazole (C8DTBTff) and 5,6-difluoro-4,7-di(4-hexyl-2-thienyl)-2,1,3-benzothiadiazole (C6DTBTff), named P-o-FBDTP-C8DTBTff (P2) and P-o-FBDTP-C6DTBTff (P3), respectively. The experimental results indicate that the incorporation of fluorine into the ortho-position of the alkoxyphenyl substituted BDT unit can enable its resultant polymer to efficiently tune the energy levels and improve the mobility of the derived bulk heterojunction layer, which results in a much higher power conversion efficiency (PCE) of P2 (8.10%). Moreover, replacing the 2-ethylhexyl chains on the DTBTff unit with hexyl chains can improve the planarity of the conjugated backbone of the polymer, which makes the P3/PC71BM blends exhibit higher carrier mobility than P2/PC71BM. Finally, a PCE of 9.02% for the device of P3 is obtained without any additive treatment, which is the highest value achieved for the widely reported D-A polymers with fluorine substituted BDT as the electron-donor unit in single junction polymer solar cells.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000378742100021
ISSN号: 2050-7488
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26586
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Wang, N,Chen, WC,Shen, WF,et al. Novel donor-acceptor polymers containing o-fluoro-p-alkoxyphenyl-substituted benzo[1,2-b:4,5-b ']dithiophene units for polymer solar cells with power conversion efficiency exceeding 9%[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016-01-01,4(26):10212-10222.
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文件名: Novel donor-acceptor polymers containing o-fluoro-p-alkoxyphenyl-substituted benzo[1,2-b_4,5-b ']dithiophene units for....pdf
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