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Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Controllable synthesis of flake-like Al-doped ZnO nanostructures and its application in inverted organic solar cells | Fan et al. Nanoscale Research Letters 2011 6 546 http www.nanoscalereslett.eom content 6 1 546 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Controllable synthesis of flake-like Al-doped ZnO nanostructures and its application in inverted organic solar cells Xi Fan Guojia Fang Shishang Guo Nishuang Liu Huimin Gao Pingli Qin Songzhan Li Hao Long Qiao Zheng and Xingzhong Zhao Abstract Flake-like Al-doped ZnO AZO nanostructures including dense AZO nanorods were obtained via a low-temperature 100 C hydrothermal process. By doping and varying Al concentrations the electrical conductivity s and morphology of the AZO nanostructures can be readily controlled. The effect of s and morphology of the AZO nanostructures on the performance of the inverted organic solar cells IOSCs was studied. It presents that the optimized power conversion efficiency of the AZO-based IOSCs is improved by approximately 58.7 compared with that of un-doped ZnO-based IOSCs. This is attributed to that the flake-like AZO nanostructures of high s and tunable morphology not only provide a high-conduction pathway to facilitate electron transport but also lead to a large interfacial area for exciton dissociation and charge collection by electrodes. Keywords Al-doped ZnO inverted organic solar cell electrical conductivity morphology Introduction In the recent years much attention in development of inverted organic solar cells IOSCs has been focused on zinc oxide ZnO nanostructures as an electron transport layer ETL which is attributed to its excellent chemical and thermal stability high electron mobility and easy fabrication 1-3 . One of the most popular structures is indium tin oxide nanostructured ZnO active layer molybdenum oxide MoO3 anode 1 2 4 5 . In such ioSC devices however ZnO nanostructures still remain challenging. On the one hand the electrical conductivity s of ZnO nanostructures which determines the characteristic of electron transfer is still not high enough .
