High-Performance All-Polymer Solar Cells and Photodetectors Enabled by a High-Mobility n-Type Polymer and Optimized Bulk-Heterojunction Morphology
Document Type
Article
Publication Date
5-12-2021
School
Polymer Science and Engineering
Abstract
All-polymer solar cells (all-PSCs) and all-polymer photodetectors (all-PPDs) are promising for application in flexible electronics, but their performance is greatly limited by the lack of polymer acceptors and the difficulties in morphology control. Herein, we report the use of a high-mobility n-type polymer semiconductor, PNDI-DTBT, for fabricating high-performance all-PSCs and all-PPDs. By pairing PNDI-DTBT with a matched polymer donor, a prominent power conversion efficiency of 8.5% was obtained in all-PSCs, demonstrating the great potential of high-mobility n-type polymers with a conventional donor–acceptor skeleton for photovoltaic application. Moreover, all-PPDs with a low dark current density of 1.32 × 10–8 A cm–2 at −0.1 V bias and a high specific detectivity of 4.77 × 1012 Jones were achieved, which belong to the best results of organic photodetectors. Morphology investigations revealed that the formation of a bicontinuous interpenetrating network with optimal phase separation scale, high domain purity, and preferential vertical composition distribution in the bulk-heterojunction active layer contribute to the remarkable device performance. These results suggest that combining high-mobility n-type polymers and morphology optimization is fruitful to achieving high-performance all-PSCs and all-PPDs.
Publication Title
Chemistry of Materials
Volume
33
Issue
10
First Page
3746
Last Page
3756
Recommended Citation
Zhao, Y.,
Liu, T.,
Wu, B.,
Zhang, S.,
Prine, N.,
Zhang, L.,
Pang, S.,
Yin, B.,
Ye, L.,
Gu, X.,
Yu, G.,
Duan, C.,
Huang, F.,
Cao, Y.
(2021). High-Performance All-Polymer Solar Cells and Photodetectors Enabled by a High-Mobility n-Type Polymer and Optimized Bulk-Heterojunction Morphology. Chemistry of Materials, 33(10), 3746-3756.
Available at: https://aquila.usm.edu/fac_pubs/18462