Highly Efficient Ternary All-Polymer Solar Cells with Enhanced Stability
- Authors
- Feng, Kui; Wu, Ziang; Su, Mengyao; Ma, Suxiang; Shi, Yongqiang; Yang, Kun; Wang, Yang; Zhang, Yujie; Sun, Weipeng; Cheng, Xing; Huang, Limin; Min, Jie; Woo, Han Young; Guo, Xugang
- Issue Date
- 1월-2021
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- all& #8208; complementary absorption; polymer acceptors; polymer solar cells; stability; ternary solar cells
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.31, no.5
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 31
- Number
- 5
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/137820
- DOI
- 10.1002/adfm.202008494
- ISSN
- 1616-301X
- Abstract
- Developing organic solar cells (OSCs) based on a ternary active layer is one of the most effective approaches to maximize light harvesting and improve their photovoltaic performance. However, this strategy meets very limited success in all-polymer solar cells (all-PSCs) due to the scarcity of narrow bandgap polymer acceptors and the challenge of morphology optimization. In fact, the power conversion efficiencies (PCEs) of ternary all-PSCs even lag behind binary all-PSCs. Herein, highly efficient ternary all-PSCs are realized based on an ultranarrow bandgap (ultra-NBG) polymer acceptor DCNBT-TPC, a medium bandgap polymer donor PTB7-Th, and a wide bandgap polymer donor PBDB-T. The optimized ternary all-PSCs yield an excellent PCE of 12.1% with a remarkable short-circuit current density of 21.9 mA cm(-2). In fact, this PCE is the highest value reported for ternary all-PSCs and is much higher than those of the corresponding binary all-PSCs. Moreover, the optimized ternary all-PSCs show a photostability with approximate to 68% of the initial PCE retained after 400 h illumination, which is more stable than the binary all-PSCs. This work demonstrates that the utilization of a ternary all-polymer system based on ultra-NBG polymer acceptor blended with compatible polymer donors is an effective strategy to advance the field of all-PSCs.
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