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Preparation and Fluorescent Properties of LiBa0.95-yBO3: 0.05Tb3+,yBi3+ |
Author Name | Affiliation | E-mail | LU Ya | Xingzhi College, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | | ZHANG Min-Zhi | College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | | LIANG Gang-Feng | Xingzhi College, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | | LI Chun-Xia | College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | | ZHAO Guo-Liang | Xingzhi College, Zhejiang Normal University, Jinhua, Zhejiang 321004, China College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | sky53@zjnu.cn |
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Abstract: Two series of phosphors of Tb3+ single doped LiBa1-xBO3:xTb3+ (molar fraction x=0.02, 0.03, 0.04, 0.05, 0.06, 0.07) and Bi3+/Tb3+ co-doped LiBa0.95-yBO3:0.05Tb3+,yBi3+ (molar fraction y=0.02, 0.03, 0.04, 0.05, 0.06, 0.07) of which can be effectively excited by (near) ultraviolet at 369, 254 nm light were prepared by high temperature solid state reaction from boric acid and carbonates. The structures and morphology of the samples were characterized by powder X-ray diffraction (PXRD) and scanning electron microscopy. PXRD measurement shows that the products of the two series are pure phase LiBaBO3. By measuring the fluorescent spectra of the first series of products, the product with the best luminescent intensity was screened out, and the optimal doping amount of Tb3+ was determined accordingly; on this basis, the second series of phosphors with different doping amounts of Bi3+ were prepared. The experimental results of fluorescent spectra show that the luminescent intensity of Tb3+/Bi3+ co doped phosphors was better than that of Tb3+ single-doped phosphors, indicating that Bi3+ sensitizes to Tb3+; the fluorescent intensity of the products increased first and then decreased with the increase of Bi3+ content, and the luminescence intensity of the products reached the maximum when the doped molar fraction y of Bi3+ was 0.03. The energy transfer from Bi3+ to Tb3+ ions is attributed to the dipole quadrupole interaction. The CIE chromaticity coordinates of the phosphors show that the luminescent color exhibited a gradual trend from green to white in some degree. |
Keywords: borate co-doped terbium bismuth phosphor fluorescent property |
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LU Ya,ZHANG Min-Zhi,LIANG Gang-Feng,LI Chun-Xia,ZHAO Guo-Liang.Preparation and Fluorescent Properties of LiBa0.95-yBO3: 0.05Tb3+,yBi3+[J].Chinese Journal of Inorganic Chemistry,2021,37(3):516-524. |
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