N-Acyldithieno[3,2-b:2',3'-d]pyrrole-Based Low-Band-Gap Conjugated Polymer Solar Cells with Amine-Modified [6,6]-Phenyl-C61-butyric Acid Ester Cathode Inter layers

被引:25
作者
Hong, Deng [1 ,3 ]
Lv, Menglan [2 ,3 ,5 ]
Lei, Ming [1 ,3 ]
Chen, Yu [3 ,4 ]
Lu, Ping [1 ]
Wang, Yanguang [1 ]
Zhu, Jin [2 ]
Wang, Haiqiao [4 ]
Gao, Mei [3 ]
Watkins, Scott E. [3 ]
Chen, Xiwen [3 ]
机构
[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
[2] Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China
[3] CSIRO Mat Sci & Engn, Clayton, Vic 3168, Australia
[4] Beijing Univ Chem Technol, Key Lab Carbon Fiber & Funct Polymers, Minist Educ, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
[5] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
关键词
polymer solar cells; low-band-gap polymers; N-acyldithienopyrrole; amine-modified fullerene; intetfacial materials; OPEN-CIRCUIT VOLTAGE; HIGH-PERFORMANCE; HIGH-EFFICIENCY; PHOTOVOLTAIC CELLS; INTERFACIAL LAYER; SEMICONDUCTING POLYMER; HIGHLY FLUORESCENT; BUILDING-BLOCKS; RATIONAL DESIGN; TANDEM POLYMER;
D O I
10.1021/am4032289
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Efficient low-band-gap polymers are one key component for constructing tandem solar cells with other higher-band-gap materials to harvest wide absorption of the solar spectrum. The N-acyldithieno[3,2-b:2',3'-d]pyrrole (DTP) building block is used for making low-band-gap polymers. It is attractive because of its strong donating ability and relatively low highest-occupied-molecular-orbital level in comparison with the N-alkyl DTP building block. However, additional solubilizing groups on the accepting units are needed for soluble donor acceptor polymers based on the N-alkanoyl DTP building block. Combining N-benzoyl DTP with a 4,7-dithieno-2,1,3-benzothiadiazole building block, a polymer with a low band gap of 1.44 eV, delivers a high short-circuit current of 17.1 mA/cm(2) and a power conversion efficiency of 3.95%, which are the highest for the devices with DTP-containing materials. Herein, an alcohol-soluble diamine-modified fullerene cathode interfacial layer improved the device efficiency significantly more than the mono-amine analogue.
引用
收藏
页码:10995 / 11003
页数:9
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