Modification of a donor-acceptor photovoltaic polymer by integration of optoelectronic moieties into its side chains
作者:Lin-Feng Yu、Cong-Wu Ge、Jin-Tu Wang、Xuan Xiang、Wei-Shi Li
DOI:10.1016/j.polymer.2015.01.008
日期:2015.2
enhance hole mobility in the pure film state. Furthermore, complicated photophysical and photochemical processes, including energy transfer, electron transfer and site-isolation effect, were observed to take place between carbazole units and the PFDTBT conjugated backbone. These factors work comprehensively and finally improve the polymer photovoltaic properties when modified with single carbazole units
在这项研究中,已经描述了通过在其侧链中整合某些光电部分来改变已知材料的光伏特性的策略。因此,大量的单和树突咔唑单元的引入聚侧链(2,7-(9,9-二烷基芴) -中高音-5,5'-(4,7-二-2-噻吩基-2,1,3-苯并噻二唑))(PFDTBT),一种著名的供体-受体替代共轭聚合物,以了解如何以及如何改变后者的光电特性。已经发现,这样的修饰不仅增加了在UV区域中的聚合物的光收集能力,而且还增强了在纯膜状态下的空穴迁移率。此外,在咔唑单元和PFDTBT共轭骨架之间发生了复杂的光物理和光化学过程,包括能量转移,电子转移和位点隔离效应。这些因素综合发挥作用,并最终在用单个咔唑单元改性时改善了聚合物的光伏性能,但在用树枝状咔唑单元改性时恶化了。