Conjugated Extension of Non-Fullerene Acceptors Enables Efficient Organic Solar Cells with Optoelectronic Response over 1000 nm

The efficient near-infrared response of light-active materials is one of the prerequisites for the most advanced organic solar cells (OSCs). Two benzodithiophene fused-ring cores (BT-4T and DBT-4T), featured with stepwise enlarged conjugations and improved electron-donor characteristics, are designe...

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Bibliographic Details
Published in:ACS applied energy materials 2022-04, Vol.5 (4), p.4664-4672
Main Authors: Zhou, Bailin, Zou, Yalu, Yi, Yuan-Qiu-Qiang, Li, Zhixiang, Long, Guankui, Yang, Yang, Wang, Jian, Wan, Xiangjian, Li, Chenxi, Yao, Zhaoyang, Chen, Yongsheng
Format: Article
Language:English
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Summary:The efficient near-infrared response of light-active materials is one of the prerequisites for the most advanced organic solar cells (OSCs). Two benzodithiophene fused-ring cores (BT-4T and DBT-4T), featured with stepwise enlarged conjugations and improved electron-donor characteristics, are designed and used as the central donor units for the construction of acceptor–donor–acceptor-type molecules ZB8 and ZB10. The significantly enhanced intramolecular charge transfer endows ZB8- and ZB10-based OSCs with a photoelectronic response over 1000 nm. With more favorable molecular energy levels and an asymmetric configuration, ZB8-based best OSCs afford a 12.30% power conversion efficiency, better than that of 11.08% for the ZB10-based one. Our successful exploration for electron-rich fused-ring cores provides a quite rare but promising platform for highly efficient OSCs with a photoelectronic response over 1000 nm.
ISSN:2574-0962
2574-0962
DOI:10.1021/acsaem.2c00092