Effect of Carbon Chain Length in the Substituent of PCBM-like Molecules on Their Photovoltaic Properties
作者:Guangjin Zhao、Youjun He、Zheng Xu、Jianhui Hou、Maojie Zhang、Jie Min、Hsiang-Yu Chen、Mingfu Ye、Ziruo Hong、Yang Yang、Yongfang Li
DOI:10.1002/adfm.200902447
日期:——
characterized, and the effect of the alkyl chain length on their properties is investigated. Although there is little difference in the absorption spectra and LUMO energy levels of F1–F5, an interesting effect of the alkyl chain length on the photovoltaic properties is observed. For the polymer solar cells (PSCs) based on P3HT as donor and F1–F5, respectively, as acceptors, the photovoltaic behavior of the
一系列的[6,6]-苯基-C 61设计并合成了PCBM中丁基链分别从3到7个碳原子变化的丁酸甲酯(PCBM)富勒烯衍生物(F1-F5),以研究光伏性质与富勒烯分子结构之间的关系衍生受体。用于比较的带有丁基链的F2是PCBM本身。表征了分子的电化学,光学,电子迁移率,形态和光伏性质,并研究了烷基链长对其性质的影响。尽管F1-F5的吸收光谱和LUMO能级几乎没有差异,但观察到烷基链长对光伏性质的有趣影响。对于分别以P3HT作为受主和F1-F5作为受主的聚合物太阳能电池(PSC),P3HT / F1和P3HT / F4系统的光伏行为与功率转换效率(PCE)高于3.5%的P3HT / PCBM器件的光伏行为相似或略好于P3HT / F3和P3HT / F5的性能基于太阳能的电池较差,PCE值低于3.0%。该现象可以通过烷基链长对P3HT / F1-F5(1:1,w / w)共混膜的吸收光谱,荧光猝灭度,电子迁移率和形态的影响来解释。