| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Preparation of ZnO Nanospheres and Their Applications in Dye-Sensitized Solar Cells |
| ZHANG Yong-Zhe, WU Li-Hui, LIU Yan-Ping, XIE Er-Qing, YAN De, CHEN Jiang-Tao |
| Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 |
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| Cite this article: |
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ZHANG Yong-Zhe, WU Li-Hui, LIU Yan-Ping et al 2009 Chin. Phys. Lett. 26 038201 |
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Abstract ZnO nanospheres are synthesized by a two-step self-assembly method. X-ray diffraction pattern and Raman scattering spectra measurements show that all the samples present a typical wurtzite structure. A regular sphere shape is inspected by field emission scanning electron microscope and transmission electron microscope for the samples. It is shown that the as-synthesized ZnO nanosphere is composed of numbers of primary particles with size of around 10nm. A possible growth mechanism for the two-step self-assembly ZnO nanosphere is proposed. After applying the ZnO nanospheres to dye-sensitized solar cells (DSSCs), a 117% increase of the overall light to electricity conversion efficiency η is observed compared with that of the ZnO nanoparticles based DSSCs. Associated with the UV-vis results, light scattering is assigned to the great improvement of η.
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| Keywords:
82.47.Jk
84.60.Jt
61.46.+w
78.30.Fs
61.82.Rx
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Received: 04 November 2008
Published: 19 February 2009
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| PACS: |
82.47.Jk
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(Photoelectrochemical cells, photoelectrochromic and other hybrid electrochemical energy storage devices)
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84.60.Jt
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(Photoelectric conversion)
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61.46.+w
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78.30.Fs
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(III-V and II-VI semiconductors)
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61.82.Rx
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(Nanocrystalline materials)
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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