Effect of polyethyleneimine on the growth of ZnO nanorod arrays and their application in dye-sensitized solar cells |
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Authors: | Qiuliu Huang Xia ChenMuhammad Saleem |
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Affiliation: | a State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Physics, Chongqing University, Chongqing 400044, PR China b College of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, PR China |
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Abstract: | A series of oriented hexagonal wurtzite ZnO nanorod-array films were grown on fluorine-doped tin oxide (FTO) coated glass substrates by chemical process. The effect of polyethyleneimine (PEI) on the structure and micro-morphology of ZnO nanorod array films, as well as the photoelectric conversion properties in dye-sensitized solar cells (DSSCs) was analyzed. It was found that with the addition of PEI in growth solution, the ZnO nanorods became smaller in diameter and longer in length and hence the dye absorption and the photovoltaic performance of DSSCs were improved. A power conversion efficiency of 2.30% had been achieved on a DSSC based on a 7.9 μm-long nanorod array film prepared by a growth solution containing the PEI. |
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Keywords: | ZnO nanorod Polyethyleneimine (PEI) Dye-sensitized solar cells Photovoltaic performance |
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