三元运算
接受者
能量转换效率
材料科学
有机太阳能电池
化学工程
光电子学
光伏
光伏系统
复合材料
聚合物
计算机科学
物理
工程类
电气工程
程序设计语言
凝聚态物理
作者
Nicola Gasparini,Sri Harish Kumar Paleti,Jules Bertrandie,Guilong Cai,Guichuan Zhang,Andrew Wadsworth,Xinhui Lu,Hin‐Lap Yip,Iain McCulloch,Derya Baran
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2020-03-31
卷期号:5 (5): 1371-1379
被引量:120
标识
DOI:10.1021/acsenergylett.0c00604
摘要
Ternary organic solar cells based on polymer donor and nonfullerene acceptors (NFAs) are delivering high power conversion efficiencies (PCE). Now, further improvement needs to be directed to enhance the operational lifetime of organic photovoltaics. Here, we selected three NFAs with different electron affinities and structural properties and found that the most crystalline third component, O-IDTBR, is selectively miscible within the acceptor phase. This reduced trap-assisted recombination and delivered a PCE of 16.6% and a fill factor of 0.76, in comparison to PM6:Y6 binary devices (15.2% PCE). Charge transport and recombination analyses revealed that O-IDTBR acts as a charge relay for improved charge transfer of both donor and acceptor materials leading to a more ordered transport. We find that minimizing trap formation in ternary devices deactivates light-induced traps upon full sun illumination (AM1.5G). As a result, ternary devices do not show any PCE drop in 225 h, in comparison to binary cells which lose more than 60% of their initial performance.
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