Controlling Molecular Weight of a High Efficiency Donor-Acceptor Conjugated Polymer and Understanding Its Significant Impact on Photovoltaic Properties

被引：193
|
作者：
Li, Wentao [1 ]
Yang, Liqiang [1 ]
Tumbleston, John R. [2 ]
Yan, Liang [1 ]
Ade, Harald [2 ]
You, Wei [1 ]
机构：
[1] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA
[2] N Carolina State Univ, Dept Phys, Raleigh, NC 27615 USA
来源：
ADVANCED MATERIALS | 2014年 / 26卷 / 26期
基金：
美国国家科学基金会;
关键词：
SIDE-CHAINS; FLUORINE SUBSTITUENTS; PERFORMANCE; MISCIBILITY; ORIENTATION; POLY(3-HEXYLTHIOPHENE); MORPHOLOGY; COPOLYMER; METAL; LEADS;
D O I：
10.1002/adma.201305251
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The molecular weight (MW) of PBnDT-FTAZ can be precisely controlled by adjusting the stoichiometric ratio of the two monomers, following the Carothers equation. The study of a set of PBnDT-FTAZ polymers with different MWs reveals that the MW significantly influences the morphology and structural order of PBnDT-FTAZ in its bulk heterojunction solar cells, with the highest efficiency (over 7%) achieved with the use of a MW of 40 000 g mol(-1).
引用
收藏
页码：4456 / +
页数：8
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