基于NDI非稠环受体的设计合成及其光电性能研究

Design and Synthesis of Naphthalene Diimide-based Unfused Ring Acceptor for Efficient Polymer Solar Cells

聚合物太阳电池具有质轻,价廉,全固态等优点,在柔性电子器件中具有广泛的应用潜质.设计合成两种基于萘并酰亚胺单元的非稠环受体材料,分别命名为SNDI-0F和SNDI-4F.相比于SNDI-0F,SNDI-4F具有更高的吸收系数,更高激子解离速率和更合适的共混膜形貌.以PM6作为聚合物给体制备聚合物太阳电池,基于PM6:SNDI-4F的共混膜展现出更高的能量转换效率为5.99%.研究结果表明,含萘并酰亚胺的非稠环受体在实现高性能的聚合物太阳电池具有巨大的潜质.

Polymer solar cells(PSCs)with bulk heterojunction(BHJ)structures have attracted tremendous research attention due to their light weight,large-areas and flexibility devices through the roll-to-roll solution process.In this study,we designed and synthesized two unfused ring acceptors based on naphthalene diimide(NDI)moiety,namely SNDI-0F and SNDI-4F,respectively.Compared to the SNDI-0F,the SNDI-4F exhibited higher absorption coefficient,higher exciton dissociation rates,more efficient charge collection and better nanoscale phase separation.Combining each unfused ring acceptor with a polymer donor PM6,an optimum power conversion efficiency(PCE)of 5.99%was achieved for the SNDI-4F blend device,whereas the devices based on the SNDI-0F exhibited a PCE of 4.06%.The results of this work indicate that the NDI unit is a promising building block for constructing nonfused ring acceptors for high-performance polymer solar cells.