Infrequent blue and green emission transitions from Eu3+ in heavy metal tellurite glasses with low phonon energy

Heat Treatment Effect on Eu3+ Doped TeO2-BaO-Bi2O3 Glass Systems with Ag Nanoparticles

“…Superior properties, for instance, mechanical and thermal stability, high devitrification resistance, and suitable infrared transparency, make tellurite glasses promising materials for variety of applications related to the field of optics, for example, light upconversion materials, lasers, solar cells, or optical amplifiers [1][2][3][4][5][6]. Additionally, these glasses are suitable for utilization as luminescent materials owing to their low phonon energy (700 cm −1 ) in comparison to other oxide glasses and wide transmission window.…”

Photoluminescence and spectral parameters of Eu3+ in sodium–aluminum–tellurite ceramics

“…Eleven emission bands locating at 418.5, 427.5, 445.0, 465.0, 487.0, 511.5, 535.5, 554.5, 586.0, 614.0 and 702.0 nm almost cover the whole visible spectrum region and they are attributed to the 5 green emissions are rarely observed in other Eu 3+ doped oxide glasses and ceramics, but here, these two bands are clearly recorded. Compared with other Eu 3+ doped solid materials, the multichannel emission behavior of Eu 3+ :NAT ceramics is similar to the case in 5Li 2 O-5K 2 O-5BaO-10Bi 2 O 3 -75TeO 2 glass system, which has low phonon energy in oxide glass systems [18].…”

“…All of them belong to high order processes (≥3 phonons) and the probability is much lower than those of low order processes such as in the cases of Eu 3+ doped traditional oxide materials [18]. When Eu 3+ :NAT ceramics are pumped by violet light, the relaxations from 5 G 2 to 5 L 6 and then from 5 L 6 to 5 D 3 are very fast because the energy gaps between them are only ∼800 and ∼1000 cm −1 , respectively.…”

Laser induced fluorescence in europium doped zinc tellurite glasses

“…Photoluminescence from rare earth doped tellurite glasses are of major interest in the area of optoelectronic device applications like phosphors, display monitors, lasers and amplifiers for communication systems etc. Tellurite glasses exhibit high rare earth ion solubility and low phonon energy environment [1][2][3][4][5][6][7][8][9][10]. Low vibrational frequencies of these glasses allow enough non-radiative transitions from the excited states of dopant ions.…”

“…Literature indicates that the current interest of researchers on tellurite glasses is because of their optical characteristics such as high refractive index, broad IR transparency and low phonon energy [1][2][3][4][5][6][7][8][9][10][11]. Structural studies are ongoing, to shed light on the short range order of tellurite glasses, based on different combinations [10][11][12][13][14].…”