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题名: Broad Bandgap D-A Copolymer Based on Bithiazole Acceptor Unit for Application in High-Performance Polymer Solar Cells with Lower Fullerene Content
作者: Wang, Kun1; Guo, Xia1; Guo, Bing1; Li, Wanbin1; Zhang, Maojie1; Li, Yongfang1, 2
关键词: 2D-conjugated D-A copolymers ; bithiazole (BTz) acceptor units ; bithienyl-benzodithiophenes ; low fullerene content ; polymer solar cells
刊名: MACROMOLECULAR RAPID COMMUNICATIONS
发表日期: 2016-07-01
卷: 37, 期:13, 页:1066-1073
收录类别: SCI
英文摘要: A new broad bandgap and 2D-conjugated D-A copolymer, PBDTBTz-T, based on bithienyl-benzodithiophene donor unit and bithiazole (BTz) acceptor unit, is designed and synthesized for the application as donor material in polymer solar cells (PSCs). The polymer possesses highly coplanar and crystalline structure with a higher hole mobility and lower HOMO energy level which is beneficial to achieve higher open circuit voltage (V-oc) of the PSCs with the polymer as donor. The PSCs based on PBDTBTz-T:PC71BM blend film with a lower PC71BM content of 40% demonstrate a power conversion efficiency (PCE) of 6.09% with a relatively higher V-oc of 0.92 V. These results indicate that the lower HOMO energy level of the BTz-based D-A copolymer is beneficial to a high V-oc of the PSCs. The polymer, with highly coplanar and crystalline structure, can effectively reduce the content of fullerene acceptor in the active layer and can enhance the absorption and PCE of the PSCs.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35177
Appears in Collections:光化学实验室_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, Inst Chem, CAS Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
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