11.73° and the exciton binding energy (Eb) was lowered from 0.396 eV to 0.367 eV when model molecule TVT-(PDI-B)2 was replaced with TYT-(PDI-B)2. As a consequence, after substituting ethylene with ethynylene in the PDI-based dimers, the PCE was significantly boosted from 1.27% to 3.47%, the observed 1.73-fold increase in PCE was mainly attributed to 107.26% increased JSC and 57.70% elevated FF resulting
选择( E )-1,2-di制备了两种具有不同扭曲度的具有优异热稳定性和光稳定性的
苝二
亚胺(PDI)基二聚体TVT-(PDI-HD) 2和TYT-(PDI-HD) 2 (thien-2-yl)ethene (TVT) 和 1,2-di(thien-2-yl)ethyne (TYT) 作为中心连接核心,以及两个N , N -bis (2-hexyldecyl)perylene-3, 4,9,10-四
羧酸二
亚胺 (PDI-HD) 亚基作为双侧翼。吸收光谱表明TYT-(PDI-HD) 2与PTB7-Th的互补性优于TVT-(PDI-HD) 2. 密度泛函理论(DFT)计算表明,当模型分子TVT- (PDI- B) 2用TYT-(PDI-B) 2代替。因此,在基于 PDI 的二聚体中用
乙烯取代
乙烯后,PCE 从 1.27% 显着提高至 3.47%,观察到的 PCE 增加 1.73 倍主要归因于J SC增加