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Nd ~ (3) / Yb ~ (3) near-infrared light-emitting materials doped inorganic Preparation and Properties

Author: YangChuangTao
Tutor: MengJianXin
School: Jinan University
Course: Analytical Chemistry
Keywords: Near-infrared light Phosphor Energy transfer Alkaline earth silicate Molybdate
CLC: O482.31
Type: Master's thesis
Year: 2011
Downloads: 113
Quote: 0
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Abstract


Nd 3 / Yb 3 doped inorganic materials with near-infrared fluorescence emission bands narrow, long fluorescence lifetime, stokes shift and other characteristics, such as a fluorescence immunoassay has great prospect, but because of its near-infrared luminescence intensity is weak in practical applications is limited, therefore, the paper dedicated to the research and matrix ions through sensitization and Nd 3 / Yb 3 < / sup> to improve the energy transfer between the material intensity of near-infrared light, the specific experiment are: to prepare a series Li2MSiO4: Eu 2 , Nd 3 (M = Ca , Sr, Ba) near-infrared light-emitting materials, found that the matrix Eu 2 can efficiently transfer energy to the Nd 3 , thereby sensitizing Nd 3 of near-infrared light. Studied Eu 2 and Nd 3 doping amount of the sample near-infrared luminescence intensity, and identifies the best in Li2CaSiO4 matrix Eu 2 and Nd 3 doping amount of 1% and 7%, Li2SrSiO4 matrix best Eu 2 and Nd 3 doping were 1% and 5%, Li2BaSiO4 matrix Eu 2 and Nd 3 The best doping were 2% and 3%. Li2SrSiO4: Eu 2 , Nd 3 in Eu 2 and Nd 3 increased efficiency of energy transfer between the other two were much higher, which can be attributed to different matrices Eu 2 and its relationship with different emission wavelength Nd 3 different excitation spectra overlap. Prepared Na2Ca4 (PO4) 2SiO4: Ce 3 , Tb 3 , Yb 3 luminescent materials found Ce 3 In sensitized Tb 3 after emission can enhance Yb ?? 3 of near-infrared light to study the preparation conditions and the amount of rare earth ions doped luminescence of the sample, the best preparation conditions the calcination temperature 1200 ℃, calcination time 1.5h, when the amount of rare earth doped 4? 3 , 10% Tb 3 and 10% Yb 3 , the samples strongest near-infrared light. Meanwhile, prepare the Na2Ca4 (PO4) 2SiO4: Ce 3 , Nd 3 luminescent materials found Ce 3 and Nd 3 exists between the effective energy transfer, when the amount of rare earth doped 4? 3 , 12% Nd 3 , the samples of the strongest near-infrared light. Prepared ZnB2O4: Eu 3 , Yb 3 and ZnMoO4: Eu 3 , Yb 3 near-infrared light-emitting materials, study of these two matrices Eu 3 incorporation of near-infrared light-emitting different roles, analyze the reasons for this difference, and initially explored in ZnMoO4: Yb 3 matrix for yb 3 of energy transfer mechanism. Prepared Gd2MoO6: Yb 3 / Nd 3 luminescent materials found Gd2MoO6: Yb 3 emission performance than ZnMoO4: Yb 3 , effects of preparation conditions and Bi 3 / W6 incorporation of near-infrared light on the impact of the sample, and explore Bi 3 and Yb 3 < / sup> mechanism of energy transfer between.

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CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Solid nature of the > Optical Properties > Luminescence
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