Effect of Zn and Li codoping ions on nanosized Gd2O3:Eu phosphor |
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Authors: | Bingjie Liu Mu Gu Xiaolin Liu Chen Ni Di Wang Lihong Xiao Riu Zhang |
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Affiliation: | aLaboratory of Waves & Microstructure Materials, Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, People's Republic of China |
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Abstract: | Nanosized Gd1.92−x−yZnxLiyEu0.08O3−δ phosphor was fabricated by combustion synthesis. The effect of Zn2+ and Li+ ions on the crystallization behavior, morphology, and luminescence property of Gd2O3:Eu3+ was investigated. The results indicated that incorporation of Zn2+ and Li+ ions into Gd2O3:Eu3+ nanoparticles (NPs) could lead to a remarkable increase of photoluminescence or X-ray excited luminescence, and the intensity at 612 nm was increased by a factor of 7.1 or 21.5 in comparison with that of undoped sample. The enhanced luminescence was regarded as the results of the creation of oxygen vacancies due to the Gd3+ sites occupied by Li+ ions, the alteration of the crystal field surrounding the activator Eu3+ ions owing to the incorporation Zn2+ ions into interstitial sites, and the flux effect of Zn2+ and Li+ ions. The Zn- and Li-codoped Gd2O3:Eu3+ phosphor with highly enhanced luminescence is very encouraging for applications in high-resolution display devices. |
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Keywords: | Phosphors Nanofabrications Optical properties Luminescence |
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