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题名: Synthesis and photovoltaic properties of D-A copolymers based on alkylthio-thiophene or alkylthio-selenophene-BDT donor unit and DPP acceptor unit
作者: Wang, Kun1; Su, Wenyan1; Guo, Xia1; Zhang, Maojie1; Li, Yongfang1, 2
关键词: Polymer solar cells ; 2D-conjugated polymers ; Alkylthio substituent ; Benzodithiophene ; DPP-based D-A copolymers
刊名: ORGANIC ELECTRONICS
发表日期: 2016-06-01
卷: 33, 页:15-22
收录类别: SCI
英文摘要: Two new 2D-conjugated D-A copolymers, PBDTT-S-DPP and PBDTSe-S-DPP, based on benzodithiophene (BDT) donor unit with alkylthio-thiophene or alkylthio-selenophene conjugated side chains and 2,5-bis(2-butyloctyl)-3,6-di(thiophen-2-yl) pyrrolo[3,4-c] pyrrole-1,4(2H, 5H)-dione) (DPP) acceptor unit, were synthesized for the application as donor materials in polymer solar cells (PSCs). The two polymers were characterized by absorption spectroscopy, cyclic voltammetry, thermogravimetric analysis, theoretical calculation with density functional theory, X-ray diffraction and photovoltaic measurements. The results show that the alkylthio-thiophene/selenophene side groups on BDT unit and intramolecular hydrogen bonding interaction in DPP acceptor unit play important roles in affecting the absorption, HOMO energy levels, molecular planarity and the crystallinity of the polymers. The PSCs based on PBDTT-S-DPP or PBDTSe-S-DPP as donor and PC71BM as acceptor demonstrate power conversion efficiency (PCE) of 5.62% and 5.01%, with relatively higher V-oc of 0.79 V and 0.76 V, respectively. (C) 2016 Elsevier B.V. All rights reserved.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/36059
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.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China
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