Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9572401 | Applied Surface Science | 2005 | 5 Pages |
Abstract
By using a low cost, low-temperature hydrothermal approach, well-aligned ZnO nanorods with high aspect ratio have been successfully prepared on ITO substrates that were pre-modified with ZnO nanoparticles. The obtained ZnO nanostructure was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy. The results of characterization indicate that the nanorods are high-quality single crystals, grow along [0Â 0Â 1] direction and for 2Â h growth time 90% of them have diameters of 120-190Â nm. The thin films consisting of ZnO nanorods with controlled orientation onto ITO substrates allow a more efficient transport and collection of photogenerated electrons through a designed path. For a sandwich-type cell, with 0.3Â mol/L LiI and 0.03Â mol/L I2 in propylene carbonate electrolyte, the overall solar energy conversion efficiency reaches 2.1%.
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Authors
Min Guo, Peng Diao, Shengmin Cai,