Homocoupling defects in porphyrinoid small molecules and their effect on organic solar cell performance
作者:Mathias Kelchtermans、Jasper Deckers、Jeroen Brebels、Jurgen Kesters、Pieter Verstappen、Raghavendran Thiruvallur Eachambadi、Zhen Liu、Niko Van den Brande、Jean Manca、Laurence Lutsen、Dirk Vanderzande、Wouter Maes
DOI:10.1016/j.orgel.2019.03.012
日期:2019.6
Porphyrinoid small molecules can be used as electron donor or acceptor components in bulk heterojunction organic solar cells, which has resulted in steadily improving power conversion efficiencies. However, the effect of material purity is often neglected. In this work, a series of D1-A-π-D2-π-A-D1 conjugated chromophores based on the A2B2-meso-ethynylporphyrin core is synthesized. Different electron-donating
卟啉类小分子可用作整体异质结有机太阳能电池中的电子供体或受体成分,从而稳定地提高了功率转换效率。但是,材料纯度的影响通常被忽略。在这项工作中,基于在A上的一系列D1-A-π-D2-π-A-D1的缀合的发色团2乙2 -内消旋- ethynylporphyrin芯被合成。选择不同的供电子(D1)端基,以研究它们对材料性能和光电特性的影响。结合PC 71,将卟啉小分子作为整体异质结有机太阳能电池中的电子供体材料进行测试BM,在标准照明下效率高达4.6%。此外,表明在最终的Sonogashira交叉偶联反应过程中会产生(格拉斯型)均相偶联的副产物,这可能很难去除。它们的存在会影响开路电压和填充系数,从而降低太阳能电池的性能。