An axisymmetric heptacyclic lactam unit for efficient polymer solar cells

作者：Hu, Wei; Zhang, Zhiquan; Xu, Yongzhuo; Cao, Jiamin^*; Liu, Shungang; Tang, Zilong^*; Zhao, Bin; Zhang, Jian^*

来源：Journal of Materials Chemistry C, 2018, 6(26): 6911-6915.

DOI：10.1039/c8tc01858h

• NON-FULLERENE ACCEPTORS
• FIELD-EFFECT TRANSISTORS
• D-A COPOLYMERS
• CONJUGATED POLYMER
• ELECTRON-ACCEPTOR
• BUILDING-BLOCK
• ORGANIC PHOTOVOLTAICS
• DIKETOPYRROLOPYRROLE
• SELENOPHENE
• DESIGN

An axisymmetric heptacyclic lactam unit TD3 has been developed by replacing the thieno[3,2-b] thiophene core of a known acceptor unit TD1 with dithieno[3,2-b:2',3'-d] thiophene. PThTD3 was obtained by copolymerizing TD3 with thiophene in good yield. PThTD3 showed red-shifted absorption, lower LUMO energy level, and better hole mobility relative to the analogue PThTD1. Inverted polymer solar cells based on PThTD3:PC71BM exhibited a decent PCE of 7.25%, which is much higher than that of PThTD1. These results have demonstrated that axisymmetric lactam TD3 is a good building block for PSC applications.

• 出版日期2018-7-14
• 单位桂林电子科技大学; 湘潭大学; 湖南科技大学