结晶度
三元运算
能量转换效率
退火(玻璃)
化学工程
混溶性
有机太阳能电池
沸点
材料科学
聚合物太阳能电池
溶剂
工艺工程
光伏系统
三元数制
环境科学
复合材料
光电子学
有机化学
化学
聚合物
工程类
程序设计语言
计算机科学
作者
Ruijie Ma,Yongzhen Yang,Yuzhong Chen,Tao Liu,Zhenghui Luo,Yuan Guo,Yiqun Xiao,Jin Fang,Guangye Zhang,Xiaojun Li,Xia Guo,Yuanping Yi,Maojie Zhang,Xinhui Lu,Yongfang Li,He Yan
标识
DOI:10.1007/s11426-020-9912-0
摘要
State-of-the-art organic solar cells (OSCs) often require the use of high-boiling point additive or post-treatment such as temperature annealing and solvent vapor annealing to achieve the best efficiency. However, additives are not desirable in large-scale industrial printing process, while post-treatment also increases the production cost. In this article, we report highly efficient ternary OSCs based on PM6:BTP-ClBr1:BTP-2O-4Cl-C12 (weight ratio=1:1:0.2), with 16.68% power conversion efficiency (PCE) for as-cast device, relatively close to its annealed counterpart (17.19%). Apart from obvious energy tuning effect and complementary absorption spectra, the improved PCE of ternary device is mainly attributed to improved morphological properties including the more favorable materials miscibility, crystallinity, domain size and vertical phase separation, which endorse suppressed recombination. The result of this work provides understanding and guidance for high-performance as-cast OSCs through the ternary strategy.
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