Manipulating aggregation and molecular orientation in all-polymer photovoltaic cells.

Ye, Long; Jiao, Xuechen; Zhou, Meng; Zhang, Shaoqing; Yao, Huifeng; Zhao, Wenchao; Xia, Andong; Ade, Harald et al. · Adv Mater · 2015

basic_science · Level V

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Abstract

Manipulating molecular orientation at the donor/acceptor interface is the key to boosting charge separation properties and efficiencies of anisotropic-materials-based organic photovoltaics (OPVs). By replacing the polymeric donor PBDTBDD with its 2D-conjugated polymer PBDTBDD-T, the power conversion efficiency of OPVs featuring the anisotropic polymer acceptor PNDI is drastically boosted from 2.4% up to 5.8%.