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Over 14.5% efficiency and 71.6% fill factor of ternary organic solar cells with 300 nm thick active layers
Energy & Environmental Science ( IF 33.250 ) Pub Date : 2020/01/27 , DOI: 10.1039/c9ee04020j
Jinhua Gao; Wei Gao; Xiaoling Ma; Zhenghao Hu; Chunyu Xu; Xuelin Wang; Qiaoshi An; Chuluo Yang; Xiaoli Zhang; Fujun Zhang

The ternary strategy exhibits great potential in optimizing the photon harvesting and phase separation of active layers. In this work, non-fullerene MF1 was selected as the third component to prepare efficient ternary organic solar cells (OSCs) by finely optimizing the MF1 content in the acceptors. The optimized power conversion efficiency (PCE) of 15.31% is achieved in the ternary OSCs with 20 wt% MF1 content in the acceptors and 100 nm active layer thickness, also exhibiting a relatively high fill factor (FF) of 78.05%. The relatively high FF indicates efficient charge transport and collection in the optimized ternary OSCs, which should be beneficial to achieve efficient thick-film OSCs. It is highlighted that a PCE of 14.57% is achieved in the optimized ternary OSCs with 300 nm thick active layers compatible with the roll-to-roll (R2R) large-scale printing process. To date, high performance thick-film ternary non-fullerene OSCs have seldom been reported. This work indicates that the thick-film ternary strategy has great potential in achieving efficient large-scale OSCs.
更新日期:2020-02-13

 

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