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Optical transmittance enhancement and bandgap widening of ZnO:Al powders by W codoping

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Abstract

(Al, W)-codoped ZnO powders with a constant molar ratio of Zn:Al (99:1) and various molar ratios of W:Al (0–0.02) were synthesized by a sol–gel process and characterized by X-ray diffraction, field emission scanning electron microscopy, and UV–vis and luminescent spectrophotometry. The experiments indicated that the powders illustrated increased c-orientation and a decreased average particle size with increasing W content. The W doping also resulted in the enhancement of transmittance in the UV–vis light range and the widening of the bandgap. Optimal efficiency appeared at molar ratio of W:Al = 0.01. Moreover, the W doping led to the formation of a new emission center and the enhancement of the emissions in range of visible light.

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Acknowledgements

The authors thank Ms. F. Tian of the Northwest Institute for Non-Ferrous Metal Research for her kind assistance in SEM measurement. The authors also thank associate Prof. J.-P. Wu, Dr. H. Liu, and Dr. Y.-P. Qiao of the Shaanxi University of Science and Technology for their kind assistances in XRD, UV–vis spectra and photoluminescence measurements, and the financial assistance of the Natural Scientific Fund Project of Shaanxi Province (2012JM6008).

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Authors and Affiliations

  1. Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an, 710021, China

    H.-Y. He, Z. He, Q. Shen & J. Lu

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  1. H.-Y. He
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  2. Z. He
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  3. Q. Shen
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  4. J. Lu
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Correspondence to H.-Y. He.

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He, HY., He, Z., Shen, Q. et al. Optical transmittance enhancement and bandgap widening of ZnO:Al powders by W codoping. J Mater Sci 48, 316–321 (2013). https://doi.org/10.1007/s10853-012-6748-9

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  • DOI: https://doi.org/10.1007/s10853-012-6748-9

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