三元运算
接受者
材料科学
有机太阳能电池
能量转换效率
富勒烯
短路
光伏系统
活动层
光电子学
开路电压
化学工程
纳米技术
有机化学
图层(电子)
电压
化学
电气工程
凝聚态物理
物理
计算机科学
程序设计语言
聚合物
复合材料
工程类
薄膜晶体管
作者
Yuli Yin,Lingling Zhan,Ming Liu,Chen Yang,Fengyun Guo,Yi Liu,Shiyong Gao,Liancheng Zhao,Hongzheng Chen,Yong Zhang
出处
期刊:Nano Energy
[Elsevier]
日期:2021-12-01
卷期号:90: 106538-106538
被引量:33
标识
DOI:10.1016/j.nanoen.2021.106538
摘要
Constructing ternary structure is one of the most effective design strategies to break the efficiency ceiling of traditional binary organic solar cells (OSCs). Here, a new Y-series non-fullerene acceptor (Y-T) featuring 1,3-diethyl-2-thiobarbituric acid (DTBA) end groups is developed as a third component for the classical PM6:Y6 binary system. The champion power conversion efficiency of ternary OSCs is increased from 15.64% to 17.37% via incorporating 10 wt% Y-T, with the simultaneously enhanced open-circuit voltage (Voc) of 0.865 V, a short-circuit current density (Jsc) of 26.90 mA/cm2, and a fill factor (FF) of 74.97%. The positive contribution of Y-T in the ternary blend can be ascribed to the improved spectroscopic complementarity and enhanced exciton utilization ratio due to the additional energy transfer process. Moreover, Y-T guest acceptor plays a critical role in adjusting the active layer morphology and facilitating three-dimension phase separation, resulting in a balanced charge transport and enhanced FF of ternary OSCs. This work provides insight into the molecular design of non-fullerene acceptor and suggest guidelines to rationally select guest component for ternary OSCs.
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