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《CHINESE JOURNAL OF LUMINESCENCE》 1999-04
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EFFECTS OF DOPING Gd~(3+) ON LUMINESCENCECHARACTER OF Y_2O_2S: Eu~(3+)

LI Cantao;; YUAN Jianhui;; ZHANG Wankai;; LIU Xingren(Phosphors Factory, IRICO GrouP Company, Xianyaang 712021. China)(Changchun Institute of Physics, Chinese Academy of Sciences, Changchun 130021, China)  
In this paper, different concentrations of Gd2O3 have been doped in the preparationof red phosphors Y2O2S: Eu3+. It is discovered that the emission intensity is enhanced5% and the voltage character (Relation between emission intensity and excitation voltage) is improved by doping proper concentration of Gd2O3 under the emission color, particle size and the properties of physics and chemistry are in keep with the request. Theenhancement origins of emission intensity are discussed and analyzed preliminarily. It islacely that the abnormal change of crystal checks that is led by the substitution of largerradius Eu3+ ion for smaller radius Y3+ ion is improved by substitution of Gd3+ ion forY3+ ion, the process of no radiation and crystal defect which lose energy are cut down.The improvement of Eu3+ ion's crystal field condition give rise to enhance of the mainemission peak 626nm, 616nm (to be attributed to 5Do→7F2) and 704urn (to be attributedto 5Do→7F4) in the CR spectra of Y2O2S: Eu3+.
【CateGory Index】: TN244
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