Optimizing Light-Harvesting Polymers via Side Chain Engineering

被引：34

作者：

Liu, Peng ^{[1
]}

Dong, Sheng ^{[1
]}

Liu, Feng ^{[2
]}

Hu, Xiaowen ^{[1
,3
]}

Liu, Liqian ^{[1
]}

Jin, Yaocheng ^{[1
]}

Liu, Shengjian ^{[1
]}

Gong, Xiong ^{[3
]}

Russell, Thomas P. ^{[4
]}

Huang, Fei ^{[1
]}

Cao, Yong ^{[1
]}

机构：

[1] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA

[4] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2015年 / 25卷 / 41期

关键词：

ACCEPTOR CONJUGATED POLYMER; SOLAR-CELL; HIGHLY EFFICIENT; SIGNIFICANT IMPACT; HOLE MOBILITIES; FILM; PERFORMANCE; COPOLYMERS; TRANSISTORS; MORPHOLOGY;

D O I：

10.1002/adfm.201501878

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of conjugated polymers using naphtho[1,2-c: 5,6-c]bis[1,2,5]thiadiazole and benzodithiophene alternating backbone is synthesized to investigate the effect of side chain substitution on conjugated donor-acceptor polymer on electronic, morphological, and photovoltaic properties. It is found that light absorption and frontier energy levels of the resultant polymers are strongly affected by the side chains. The thin film morphology, crystal structure, crystallinity, and orientation also depend on the side chains; the side chain type affects more in the pi-pi stacking direction, while the side chain density plays a significant role in the lamellar packing direction. The thickness of the active layer also influences the performance of the solar cells with some materials showing enhanced performance with thicker active layers. The best solar cell device in this study has power conversion efficiencies of 8.14%, among the highest in materials of similar structure.

引用

页码：6458 / 6469

页数：12

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