The Effect of Processing Additives on Energetic Disorder in Highly Efficient Organic Photovoltaics: A Case Study on PBDTTT-C-T:PC71 BM.

Gao, Feng; Himmelberger, Scott; Andersson, Mattias; Hanifi, David; Xia, Yuxin; Zhang, Shaoqing; Wang, Jianpu; Hou, Jianhui et al. · Adv Mater · 2015

basic_science · Level V

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Abstract

Energetic disorder, an important parameter affecting the performance of organic photovoltaics, is significantly decreased upon the addition of processing additives in a highly efficient benzodithiophene-based copolymer blend (PBDTTT-C-T:PC71 BM). Wide-angle and small-angle X-ray scattering measurements suggest that the origin of this reduced energetic disorder is due to increased aggregation and a larger average fullerene domain size together with purer phases.

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