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 state6H5/2to 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.
Ultrafast ammonia-driven, microwave-assisted synthesis of nitrogen-doped graphene quantum dots and their optical properties