光电流
材料科学
色素敏化染料
能量转换效率
接受者
电子受体
开路电压
光电子学
光化学
化学
电压
电解质
电极
物理化学
电气工程
物理
工程类
凝聚态物理
作者
Jun Cheng,Yaxiong Cao,Xiaozhong Liang,Jingxia Zheng,Fang Zhang,Shuxian Wei,Xiaoqing Lü,Kunpeng Guo,Shihe Yang
标识
DOI:10.1016/j.matchemphys.2017.02.003
摘要
Three dithiafulvene-based metal-free organic sensitizers all using pyridine as the acceptor but with different π-bridges of phenyl (DTF-Py1), thienyl (DTF-Py2) and phenyl-thienyl (DTF-Py3) have been designed, synthesized and used as photosensitizers for dye-sensitized solar cells (DSCs). Introducing thienyl unit into the π-bridge, as well as extension of the π-bridge can dramatically improve their light harvesting ability and suppress the electron recombination, thus uplifting the performance of DSCs. The overall power conversion efficiency of DSC based on DTF-Py3 shows the highest efficiency of 2.61% with a short-circuit photocurrent density of 7.99 mA cm−2, an open-circuit photovoltage of 630 mV, and a fill factor of 0.52, under standard global AM 1.5 solar light condition. More importantly, the long-term stability of the DTF-Py3 based DSCs under 500 h light-soaking has been demonstrated.
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