Synthesis and photoluminescence of Y and Cd co-doped ZnO nanopowder

Y and Cd co-doped ZnO nanopowders were prepared via chemical precipitation method in order to modify the band gap and increase the luminescent intensity. The structures and optical properties of the as-synthesized samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscop...

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Published in:Transactions of Nonferrous Metals Society of China 2013-08, Vol.23 (8), p.2336-2340
Main Authors: SONG, Ji-ling, ZHENG, Jia-hong, ZHAO, Zhen, ZHOU, Bai-yu, LIAN, Jian-she
Format: Article
Language:English
Subjects:
Cadmium
chemical precipitation
Emission
Emission spectroscopy
Nanostructure
Optical properties
Photoluminescence
X-rays
Zinc oxide
ZnO nanopowders
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Summary:Y and Cd co-doped ZnO nanopowders were prepared via chemical precipitation method in order to modify the band gap and increase the luminescent intensity. The structures and optical properties of the as-synthesized samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL). The effects of Y and Cd ions on the optical properties of the samples were studied. Doping of Y into ZnO evidently increases the intensity of UV emission, or co-doping of Y and Cd enhances the UV emission, narrows the band gap of ZnO and hence red shifts the UV emission at the same time. Therefore, Y and Cd co-doped ZnO nanopowders exhibit an intense violet emission in the room temperature PL spectrum, which could be a potential candidate material for optoelectronic applications.
ISSN:1003-6326
DOI:10.1016/S1003-6326(13)62738-7