Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.
J Am Chem Soc. 2013 Jun 19;135(24):8834-7. doi: 10.1021/ja404064m. Epub 2013 Jun 5.
We show that rational functionalization of the naphthodithiophene core in copolymers based on naphthodithiophene and naphthobisthiadiazole improves the solubility without an alteration of the electronic structure. Surprisingly, the introduction of linear alkyl chains brings about a drastic change in polymer orientation into the face-on motif, which is beneficial for the charge transport in solar cells. As a result, the present polymers exhibit high power conversion efficiencies of up to ~8.2% in conventional single-junction solar cells.
我们表明，通过对基于萘并二噻吩和萘并双噻二唑的共聚物的萘并二噻吩核心进行合理的功能化，可以在不改变电子结构的情况下提高溶解性。令人惊讶的是，线性烷基链的引入会使聚合物在面向上的构象中发生剧烈变化，这有利于太阳能电池中的电荷输运。因此，这些聚合物在传统的单结太阳能电池中表现出高达~8.2%的高功率转换效率。
