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应用于高分子给体的稠环双内酯构筑单元(英文)

发布时间:2021-11-08 00:43
  近年来,由于新型、高效高分子给体和非富勒烯受体的不断涌现,有机太阳电池性能得以快速提高.本文开发了基于稠环双内酯构筑单元的高分子给体材料,设计合成了两种五元稠环双内酯单元BL1和BL2,并进一步用这两种单元构筑了D-A共轭高分子给体P1和P2. BL1和BL2的分子结构通过X射线单晶衍射方法得到解析. BL1呈现完全平面化的分子结构, BL2则由于分子中两个相邻羰基的排斥作用而呈现一种扭曲平面结构.由于双内酯基团的强吸电子性以及BL1和BL2单元较大的稠环平面,高分子给体P1和P2展现出较深的HOMO能级和较好的空穴迁移率.基于上述高分子给体和非富勒烯受体IT-4F的太阳电池P1:IT-4F和P2:IT-4F实现了较高的开路电压,分别为0.96和0.94 V,能量转换效率分别为10.44%和7.31%. 

【文章来源】:Science Bulletin. 2020,65(21)EISCICSCD

【文章页数】:4 页

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