接受者
三元运算
有机太阳能电池
戒指(化学)
电子受体
芯(光纤)
电子
短路
电子迁移率
光伏系统
吸收(声学)
材料科学
能量转换效率
光电子学
化学
物理
电压
光化学
复合材料
有机化学
聚合物
量子力学
凝聚态物理
程序设计语言
生物
生态学
计算机科学
作者
Shuixing Dai,Yiqun Xiao,Peiyao Xue,Jeromy James Rech,Kuan Liu,Zeyuan Li,Xinhui Lu,Wei You,Xiaowei Zhan
标识
DOI:10.1021/acs.chemmater.8b02222
摘要
We report 4 fused-ring electron acceptors (FREAs) with the same end-groups and side-chains but different cores, whose sizes range from 5 to 11 fused rings. The core size has considerable effects on the electronic, optical, charge transport, morphological, and photovoltaic properties of the FREAs. Extending the core size leads to red-shift of absorption spectra, upshift of the energy levels, and enhancement of molecular packing and electron mobility. From 5 to 9 fused rings, the core size extension can simultaneously enhance open-circuit voltage (VOC), short-circuit current density (JSC), and fill factor (FF) of organic solar cells (OSCs). The best efficiency of the binary-blend devices increases from 5.6 to 11.7%, while the best efficiency of the ternary-blend devices increases from 6.3 to 12.6% as the acceptor core size extends.
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