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%
Wang, N; Chen, WC; Shen, WF; Duan, LR; Qiu, M; Wang, JY; Yang, CM; Du, ZK; Yang, RQ; 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.
2016
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
卷号4期号:26页码:10212-10222
文章类型期刊论文
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.
DOI10.1039/c6ta03709g
收录类别SCI
语种英语
WOS记录号WOS:000378742100021
引用统计
被引频次:25[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/26586
专题中科院上海应用物理研究所2011-2018年
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.
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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,2016,4(26):10212-10222.
APA Wang, N.,Chen, WC.,Shen, WF.,Duan, LR.,Qiu, M.,...&Yang, RQ .(2016).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%.JOURNAL OF MATERIALS CHEMISTRY A,4(26),10212-10222.
MLA Wang, N,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%".JOURNAL OF MATERIALS CHEMISTRY A 4.26(2016):10212-10222.
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