TY - JOUR
T1 - Highly Efficient Ternary All-Polymer Solar Cells with Enhanced Stability
AU - Feng, Kui
AU - Wu, Ziang
AU - Su, Mengyao
AU - Ma, Suxiang
AU - Shi, Yongqiang
AU - Yang, Kun
AU - Wang, Yang
AU - Zhang, Yujie
AU - Sun, Weipeng
AU - Cheng, Xing
AU - Huang, Limin
AU - Min, Jie
AU - Woo, Han Young
AU - Guo, Xugang
N1 - Funding Information:
K.F. acknowledges the financial support by Shenzhen Basic Research Fund (No. JCYJ20190809162003662) and the China Postdoctoral Science Foundation (No. 2019M662696). X.G. is thankful for the financial support by the Shenzhen Basic Research Fund (Nos. JCYJ20180504165709042 and JCYJ20170817105905899). H.Y.W. is grateful for the financial support from the National Research Foundation (NRF) of Korea (NRF‐2016M1A2A2940911 and 2019R1A6A1A11044070). The calculation is supported by the Center for Computational Science and Engineering at SUSTech. The authors also acknowledge the assistance of SUSTech Core Research Facilities.
PY - 2020
Y1 - 2020
N2 - 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 ≈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.
AB - 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 ≈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.
KW - all-polymer solar cells
KW - complementary absorption
KW - polymer acceptors
KW - stability
KW - ternary solar cells
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U2 - 10.1002/adfm.202008494
DO - 10.1002/adfm.202008494
M3 - Article
AN - SCOPUS:85093668742
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
ER -