Abstract
Pr³⁺-doped Li2O – Gd2O3 – B2O3 glasses (LGBO glass) with the formula 60Li2O:10Gd2O3:(30-x)B2O3:xPrO3 were fabricated using melt quenching technique. The five glass samples with different concentrations of Pr2O3 were prepared under atmospheric pressure. The samples were investigated on their properties: absorption and photoluminescence. All absorption bands are increase with increasing of Pr³⁺ content. The emission spectra were measured with 446 nm light pumped by xenon lamp. The maximum luminescence intensity was observed at x = 0.50 mol% andthe CIE color coordinates showed the bluish purple emission light for this concentration.
Fabrication and Properties of Pr3+-Doped Lithium Gadolinium.... Available from: https://www.researchgate.net/publication/308042140_Fabrication_and_Properties_of_Pr3-Doped_Lithium_Gadolinium_Borate_Glasses [accessed Jun 04 2018].
Abstract
Melt quenching technique have been used to prepare the dysprosium-doped lithium-gadolinium borate glasses, which have the composition [60Li2O:10Gd2O3:(30-x) B2O3:xDy2O3] (LGBO:Dy³⁺), under atmospheric pressure. Some properties: density, molar volume, absorption spectra and photoluminescence of the LGBO:Dy3+ glasses were investigated and discussed. The density of glasses drops to the minimum point at 0.05 mol% and swings after that point. The molar volume of the glasses does not depend on Dy2O3concentration. In absorption spectra for the range of visible to near infrared wavelengths, there are 5 obvious peaks indicating the Dy³⁺ in glass network. The intensity of each peak at certain wavelength increases with concentration of the Dy2O3. Whereas the excitation spectra show 7 obvious peaks representing the transitions from the ground state 6H15/2to various excited states. The Xenon compact arc lamps were used to measure the emission spectra with 388 nm light. As the result, the LGBO:Dy³⁺ glass sample with 0.50 mol% of Dy³⁺ shows the highest intensity in the emission spectra.
Luminescence Characteristics of Li2O3:Gd2O3:B2O3:Dy2O3.... Available from: https://www.researchgate.net/publication/291949175_Luminescence_Characteristics_of_Li2O3Gd2O3B2O3Dy2O3_Glasses_System [accessed Jun 04 2018].
Abstract
The samarium-doped lithium-gadolinium borate [60Li2O:10Gd2O3:(30-x) B2O3:xSm2O3] (LGBO:Sm3+) glasses have been melted and quenched in stainless plate under an air atmosphere. Some physical and optical properties within wavelength concerned and photoluminescence of the LGBO:Sm3+ glasses were measured and discussed. The density of glasses dropped until 0.10 mol% and tends to increase after that point, while molar volume of the glasses tends to increase with concentration of Sm2O3.. In absorption spectra, there are 2 obvious peaks in UV-VIS range and 6 peaks in NIR range indicating the Sm3+ in glass matrices. The sharpness of a peak, in the absorption spectra, also increases with concentration of the dopant. The 7 obvious peaks in excitation spectra represent the transitions from the ground state 6H5/2 to various excited states. Furthermore, The emission spectra were observed under 404 nm light from the Xenon compact arc lamps, and showed the concentration quenching effect (CQE) at 1.00 mol% of Sm3+. Additional, The lifetimes showed decreasing trend with concentration of Sm2O3.. As the result, The LGBO:Sm3+ glass doped with 1.00 mol% of Sm3+ gives the highest result for luminescence properties.
Luminescence and Optical Properties of... (PDF Download Available). Available from: https://www.researchgate.net/publication/271570529_Luminescence_and_Optical_Properties_of_Li2O3Gd2O3B2O3Sm2O3_Glasses_System [accessed Jun 04 2018].