分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-08
Song, CJ [Song, Changjian][ 1,2 ]
Liu, XH [Liu, Xiaohui][ 2 ]
Li, XD [Li, Xiaodong][ 2 ]
Zhang, WJ [Zhang, Wenjun][ 2 ]
Bai, YL [Bai, Yueling][ 1 ]
Fang, JF [Fang, Junfeng][ 2 ]
摘要： The cathode interlayer is essential to bulk heterojunction polymer solar cells (PSCs). As we all know, most of the organic interfacial materials are amino derivatives, including neutral amine derivatives and ammonium derivatives. Herein, a non-amino small molecule, TBT-a, with sulfonate anionic pendants was synthesized and interface modification was investigated. The PSC with TBT-a as the cathode interlayer exhibited a high power conversion efficiency of 8.68%. We found that the TBT-a interlayer simultaneously enhanced all the device parameters, probably by inducing an effective interface dipole, altering the optical distribution, and enhancing the electron mobility. These results indicated that sulfonate interfacial materials could play a similar role as amine-based interfacial materials in interface modification.
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02
Li, PD [Li, Pandeng][ 1,2 ]
Li, XF [Li, Xiaofang][ 1 ]
Sun, CM [Sun, Chunming][ 2 ]
Wang, GJ [Wang, Guojie][ 2 ]
Li, J [Li, Jun][ 2 ]
Jiu, TG [Jiu, Tonggang][ 2 ]
Fang, JF [Fang, Junfeng][ 2 ]
摘要： In this paper, we reported that ZnO nanoparticles (NPs) film modified with C60 pyrrolidine tris-acid ethyl ester (PyC60) was used as cathode buffer layer in inverted polymer solar cells. The resultant device with a blend of PTB7:PC71BM as photoactive materials exhibited an open-circuit voltage (Voc) of 0.753 V, a short-circuit current (Jsc) of 16.04 mA cm 2, a fill factor (FF) of 72.5%, and an overall power conversion efficiency (PCE) of 8.76%. It was higher than the control devices based on sole ZnO NPs film or ZnO: PyC60 hybrid film as cathode buffer layer. It was found that the morphology improvement of ZnO/PyC60 film contributed to reducing series loss and interfacial charge recombination. In addition, it improved the interfacial contact with photoactive layer. The results increased electron injection and collection efficiency, and improved FF.
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