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题名: High-performance polymer solar cells based on a 2D-conjugated polymer with an alkylthio side-chain
作者: Cui, Chaohua1, 2, 3; He, Zhicai4; Wu, Yue1; Cheng, Xiao1; Wu, Hongbin4; Li, Yongfang1, 5; Cao, Yong4; Wong, Wai-Yeung2, 3
刊名: ENERGY & ENVIRONMENTAL SCIENCE
发表日期: 2016
卷: 9, 期:3, 页:885-891
收录类别: SCI
英文摘要: Two new two-dimension (2D)-conjugated copolymers (PBDTT-S-TT-CF and PBDTT-O-TT-CF) were designed and synthesized for the application as donor materials in polymer solar cells (PSCs) and for further investigation of the effect of alkylthio side chains on the photovoltaic performance of 2D-conjugated polymers. The two copolymers were prepared by the copolymerization of alkylthio- or alkoxy-thienyl-benzodithiophene (BDTT-S or BDTT-O) and thienothiophene with carbonyl and fluorine substituents (TT-CF), and they demonstrated strong and broad absorption spectra in the wavelength region from 450 nm to ca. 800 nm. The HOMO energy level of PBDTT-S-TT-CF was further down-shifted to -5.44 eV by alkylthio substitution on thiophene conjugated side chain of BDT unit and the carbonyl and fluorine substitution on TT unit. The inverted-structured PSCs based on PBDTT-S-TT-CF:PC70BM exhibited a high PCE of 9.58% with a remarkably high V-oc of 0.89 V and a high FF of 71.0%. The PCE of the PSCs based on PBDTT-O-TT-CF also reached a high value of 8.68% with a V-oc = 0.78 V and a higher J(sc) = 16.5 mA cm(-2), which is benefited from the broad absorption of PBDTT-O-TT-CF. The results further confirm the unique advantages of the alkylthio side chain in the design of state-of-the-art polymer donor materials for high performance PSCs with high V-oc.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35915
Appears in Collections:有机固体实验室_期刊论文

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作者单位: 1.Soochow Univ, Coll Chem Chem Engn & Mat Sci, Lab Adv Optoelect Mat, Suzhou 215123, Peoples R China
2.Hong Kong Baptist Univ, Inst Mol Funct Mat, Dept Chem, Waterloo Rd, Hong Kong, Hong Kong, Peoples R China
3.Hong Kong Baptist Univ, Inst Adv Mat, Waterloo Rd, Hong Kong, Hong Kong, Peoples R China
4.S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China
5.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China
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