Abstract
Core-shell heterogeneous CdTe/TiO 2 nanorod arrays have been prepared by a two-step synthesis route through combined hydrothermal growth and magnetron sputtering. The composition and microstructure of the arrays were investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), which show that CdTe nanograins coated on the surface of the single-crystalline TiO 2 nanorod arrays to form a type-II heterostructure. Compared with TiO 2 nanorod arrays, the spectrum absorption region of CdTe/TiO 2 core-shell nanostructure is broadened from ultraviolet light to visible light. The photoelectrodes of CdTe/TiO 2 nanorod arrays show better photoelectric properties than those of bare TiO 2 nanorod arrays. The output power of CdTe/TiO 2 nanorod arrays is 25 times higher than that of a bare TiO 2 nanorod array. These results indicate that the photoelectrode of CdTe/TiO 2 nanorod array has a promising application in solar cell.
| Original language | English |
|---|---|
| Pages (from-to) | 192-197 |
| Number of pages | 6 |
| Journal | Journal of Alloys and Compounds |
| Volume | 517 |
| DOIs | |
| State | Published - 15 Mar 2012 |
Keywords
- Light absorption and reflection
- Nanofabrications
- Nanostructured materials
- Photoconductivity and photovoltaics
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