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Inverted Structure Polymer Solar Cells With Solution Processed Zinc Oxide Thin Film As An Electron Collection Layer, Tingbin Yang, Donghuan Qin, Linfeng Lan, Wenbo Huang, Xiong Gong, Junbiao Peng, Yong Cao
Inverted Structure Polymer Solar Cells With Solution Processed Zinc Oxide Thin Film As An Electron Collection Layer, Tingbin Yang, Donghuan Qin, Linfeng Lan, Wenbo Huang, Xiong Gong, Junbiao Peng, Yong Cao
Xiong Gong
A solution-processed zinc oxide (ZnO) thin film as an electron collection layer for polymer solar cells (PSCs) with an inverted device structure was investigated. Power conversion efficiencies (PCEs) of PSCs made with a blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) are 3.50% and 1.21% for PSCs with and without the ZnO thin film, respectively. Light intensity dependence of the photocurrent and the capacitance-voltage measurement demonstrate that the increased PCEs are due to the restriction of the strong bimolecular recombination in the interface when a thin ZnO layer is inserted between the polymer active layer and the …