Optical study of GeO2–PbO–PbF2 oxyfluoride glass singly doped with Pr3+, Nd3+, Sm3+ and Eu3+

Specific features of fluorescence kinetics of Pr+3 doped BiB3O6 glasses

“…Moreover, the comparison with other crystalline and glass matrices indicates that the X 2 JO parameter is one of the higher among the presented matrices with except of the CdS nanoparticles in sol-gel glasses [18]. The similar behavior is observed for the X 4 and X 6 JO parameters, however for the case of GeO 2 -PbO-PbF 2 oxyfluoride glass [15], MgTP glass [17] and Li 2 O-Al 2 O 3 -ZrO 2 -SiO 2 glasses [19]. However, generally the efficient JO parameters are indicating a promising use of such materials in different fluorescent optoelectronic devices.…”

Spectroscopic properties of Sm 3+ -doped lanthanum borogermanate glass

“…Many fluorescent transitions of rare earth ions of practical importance are initiated from an excited level with a small energy gap; materials with lower phonon energy are often required as a luminescent host to suppress the non-radiative loss and to obtain higher quantum efficiency of the desired fluorescence. Most oxide glasses have large phonon energy (1100 cm À 1 ) due to the stretching vibration of network-forming oxides [2]. It is found that germanate glasses, presumably due to the large mass of Ge, have smaller maximum vibrational frequencies than those shown by silicate, phosphate and borate glasses.…”

Spectroscopy features of Pr3+ and Er3+ ions in Li2O–ZrO2–SiO2 glass matrices mixed with some sesquioxides

“…In the case of Pr 3+ doped glasses due to a strong mixture between the 4f 2 and 4f 5d states the second order intensity parameter ˝2 [34][35][36][37] is likely that negative. To overcome this drawback, the modified JO theory [38,39] has been used:…”