Using Cyclopenta[2,1-b:3,4-c′]dithiophene-4-one as a Building Block for Low-Bandgap Conjugated Copolymers Applied in Solar Cells

被引：15
作者：
Zhang, Wei [1 ,3 ]
Cao, Jiamin [1 ,2 ]
Liu, Ying [1 ]
Xiao, Zuo [1 ]
Zhu, Weiguo [2 ]
Zuo, Qiqun [4 ]
Ding, Liming [1 ]
机构：
[1] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China
[2] Xiangtan Univ, Coll Chem, Key Lab Environm Friendly Chem & Applicat, Minist Educ, Xiangtan 411105, Peoples R China
[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[4] Jiahong Optoelect, Suzhou 215151, Peoples R China
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2012年 / 33卷 / 18期
关键词：
conjugated polymers; electron-accepting unit; low bandgap; low-lying HOMO level; polymer solar cells; OPEN-CIRCUIT VOLTAGE; PHOTOVOLTAIC PROPERTIES; HIGH-PERFORMANCE; ACCEPTOR GROUPS; POLYMER; DONOR; GAP; CARBAZOLE; STABILITY;
D O I：
10.1002/marc.201200311
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A novel electron-accepting unit cyclopenta[2,1-b:3,4-c']dithiophene-4-one (CPDTO-c'), which is an isomer of CPDTO-b' was developed. CPDTO-c' can be incorporated into the DA backbone through 5, 7 positions. The 2 position of CPDTO-c' can be easily functionalized with an electron-withdrawing chain. By copolymerizing CPDTO-c' with four different donor units: benzo[1,2-b:4,5-b']dithiophene (BDT), dithieno[3,2-b:2',3'-d]silole (DTS), carbazole, and fluorene, four new conjugated copolymers P1P4 were obtained. All these polymers have good solubility and low-lying HOMO energy levels (-5.41 similar to -5.92 eV). Among them, P1 and P2 exhibit broad absorption and narrow optical bandgaps of 1.91 and 1.72 eV, respectively. Solar cells based on P1/PC71BM afforded a PCE up to 2.72% and a high Voc up to similar to 0.9 V.
引用
收藏
页码：1574 / 1579
页数：6
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