351. Ester-substituted copolymer-based ternary semitransparent polymer solar cells with enhanced FF and PCE.
- Author
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Zhu, Kun, Wang, Xiangkun, He, Yan, Zhai, Xiaohua, Gao, Caiyun, Wang, Quanliang, Jing, Xin, Yu, Liangmin, and Sun, Mingliang
- Subjects
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SOLAR cells , *POLYMERS , *PRODUCTION sharing contracts (Oil & gas) - Abstract
Ternary polymer solar cells (PSCs) are one of the most promising high-efficiency photovoltaic devices with advantages of simple solution fabrication and single-junction structure. Herein, we fabricated ternary PSCs with PC 71 BM as the third component, and ester-polymer PFTzTT-3TC as donor and ITIC as host acceptor. So after treatment-annealing, ternary devices based on PFTzTT-3TC: ITIC: PC 71 BM (1:1:0.05) exhibited a prominently increased V OC of 0.93 V and PCE of 8.87%. The optimal devices (1:1:0.30) delivers a state of art FF of 71.76%, which is over 22% higher than the value of 58.40% in binary devices. Ternary semitransparent solar cells (1:1:0.25, 15 and 20 nm Ag as cathode) produced a PCE of 6.49% and 7.18% and an AVT of 11.91% and 9.29%, respectively. Our work demonstrated that ternary strategy is a promising solution to improve photovoltaic parameters simultaneously though rational selection of matched fullerene and non-fullerene acceptors. [Display omitted] • The FF of ternary OSC was obviously improved by the additional PC 71 BM from 58.40% to 71.76%. • An enhanced PCE of 8.95% was achieved in the 30 wt% PC 71 BM incorporated ternary OSC. • Applying ester-polymer into ternary semitransparent PSCs was reported firstly. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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