TiO2 nanorods branched on fast-synthesized large clearance TiO2 nanotube arrays for dye-sensitized solar cells |
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Authors: | Anzheng Hu Haina Li Zhiyong Jia Zhengcai Xia |
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Affiliation: | aSchool of Physics and Electronic Engineering, Xiangfan University, Xiangfan 441053, Hubei, PR China;bWuhan National High Magnetic Field Center, Huazhong University of Science and Technology, PR China |
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Abstract: | A large clearance TiO2 nanotube arrays (LTAs) has been synthesized by a not more than 12 h anodization duration and based on this a branched TiO2 nanotube arrays (BLTs) has been achieved through TiO2 nanorods branch-like grown on the LTAs. Some key factors and probable mechanisms of the fabrication processes on two novel nanoarchitectures are discussed. Exhilaratingly, it is found that the obtained LTAs has demonstrated large pore diameter and void spaces (pore diameter ∼350 nm; void spaces ∼160 nm; and tube length ∼3.5 μm), and the synthesized hierarchical BLTs, compared with conventional TiO2 nanotube arrays, has shown a much stronger dye absorption performance and an approximately double of the solar cell efficiency (in our case from 1.62% to 3.18% under simulated AM 1.5 conditions). |
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Keywords: | Branched TiO2 nanorods Large clearance nanotubes Modification Dye-sensitized solar cells |
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