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Band gap narrowing of cadmium oxide powder by rare earth praseodymium doping

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Abstract

Rare earth Pr-doped cadmium oxide (CdO) powders with various Pr contents (0–2.0 at.%) were synthesized by a coprecipitation process and characterized by x-ray diffraction, field emission scanning electron microscopy, and UV-vis spectrophotometry. The experimental results indicate that Pr doping led to a decrease of average particle size and change of optical property. The CdO powder with Pr content 0.5 at.% show a maximum Eg decrease of about 3.6% and an absorbance increase of about 8.26%. This variation is explained by the available band gap narrowing models and variations in lattice parameter and density with Pr content.

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Acknowledgments

The authors thank Ms. F. Tian of the Northwest Institute for Non-Ferrous Metal Research for her kind assistance in SEM measurement, Mr. J.P. Wu and Dr. H. Liu of the Shaanxi University of Science and Technology for their kind assistance in XRD and UV-vis spectra measurements, respectively.

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  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 & J. Lu

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  1. H.-Y. He
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  2. J. Lu
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Correspondence to H.-Y. He.

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He, HY., Lu, J. Band gap narrowing of cadmium oxide powder by rare earth praseodymium doping. MRS Communications 3, 47–50 (2013). https://doi.org/10.1557/mrc.2013.6

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