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

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 21期

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

页码：10995 / 11003

页数：9

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