Achieving high-performance non-halogenated nonfullerene acceptor-based organic solar cells with 13.7% efficiency <i>via</i> a synergistic strategy of an indacenodithieno[3,2-<i>b</i>]selenophene core unit and non-halogenated thiophene-based terminal group
作者:Kai-Kai Liu、Xiaopeng Xu、Jin-Liang Wang、Chao Zhang、Gao-Yang Ge、Fang-Dong Zhuang、Han-Jian Zhang、Can Yang、Qiang Peng、Jian Pei
DOI:10.1039/c9ta08328f
日期:——
selenophene-functionalized electron-rich central core (indacenodithieno[3,2-b]selenophene) and a new non-halogenated A–D–A architecture non-fullerene small molecular acceptor (NF-SMA) (TSeTIC) based on indacenodithieno[3,2-b]selenophene as the central unit and thiophene-fused IC as a terminal group was designed and synthesized for high performance organic solar cells. In contrast to the similar NF-SMA (TTTIC)
硒原子官能化的最外层富电子中心核(indacenodithieno [3,2- b ] selenophene)和基于indacenodithienono的新型非卤化A–D–A结构非富勒烯小分子受体(NF-SMA)(TSeTIC)设计并合成了以[3,2- b ]硒烯为中心单元和噻吩-熔融IC为末端基团的高性能有机太阳能电池。与具有indacenodithieno [3,2- b ]噻吩单元的类似NF-SMA(TTTIC)相比,TSeTIC表现出更强的红移吸收光谱,更高的最高占据分子轨道(HOMO)能级和增强的电子迁移率在整齐的薄膜中。此外,TSeTIC与基于TTTIC / PM6的器件相比,基于/ PM6的器件具有更高的空穴/电子迁移率,更好的相分离特性和良好的形貌,以及更高的电荷解离和收集效率,从而在不牺牲V oc的情况下显着提高了J sc和FF 。因此,与PM6 / TTTIC器件的最佳PCE为12