Tunable emission and energy transfer in TeO2-GeO2-ZnO and TeO2-GeO2-MgCl2 glasses activated with Eu3+/Dy3+ for solid state lighting applications

The fabrication of nanodiamond doped tellurite germanate glass with robust structure and its luminescence

“…Despite the shape of the bands is not changed by bits of GeO 2 and B 2 O 3 addition, slight shifts of band positions happen in TZNGB glass. The blue shift of Te‐O‐Te stretching vibration is due to the deformation of Te‐O‐Te bond caused by the introduction of GeO 2 42–44 . The blue shift at near 678 cm ‐1 might be attributed to the formation of [GeO 4 ] 4‐ units after the addition of GeO 2 , which can provide partial oxygen ions to achieve the network continuity and relative stability in a tellurite glass structure 45–47 …”

“…The blue shift of Te-O-Te stretching vibration is due to the deformation of Te-O-Te bond caused by the introduction of GeO 2 . [42][43][44] The blue shift at near 678 cm -1 might be attributed to the formation of [GeO 4 ] 4units after the addition of GeO 2 , which can provide partial oxygen ions to achieve the network continuity and relative stability in a tellurite glass structure. [45][46][47] Raman and PL measurement of t-ND that have been treated by annealing and oxidation and raw ND powder were performed, as shown in Figures 4 and 5, respectively.…”

Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application

“…trigonal pyramids (tp's) with three terminal oxygen atoms; symmetrical stretching vibrations of the Ge-O − of Ge (1) The band in the 305-310 cm −1 range can be associated with the bending vibrations of the Te-O-X bridges, where X = Te, Ga, Ge [59]. The band in the 420-460 cm −1 range was related to symmetric stretching vibrations of Te-O-Te bridges formed by cornersharing of [TeO 4 ]tbp, [TeO 3+1 ] polyhedra, and [TeO 3 ]tp units [60]. Moreover, the band in the 420-460 cm −1 range overlapped with symmetric stretching vibrations of Ge-O-Ge in 4-membered GeO 4 rings [48].…”

Color Tunable Emission of Y3Al5O12:Ce3+and Sm3+‐Doped Zinc–Germanate–Tellurite Glass Nanocomposite Powders and Coatings for Light‐Emitting Diodes Applications

“…On the contrary, inorganic materials such as oxide glasses have excellent thermal conductivity and thermal stability, specially germanate and tellurite, which have been the subject of intense research as hosts for rare‐earth ions. [ 29–32 ] Tellurium oxide glasses optical properties such as high refractive index, high transparency, and low phonon energy are desired for trivalent lanthanide ions host matrix to obtain PL properties adequate for LEDs applications. [ 29–32 ] Sm 3+ ‐doped tellurite glasses have been widely studied as reddish‐orange‐emitting phosphor for LED applications and often are combined with other rare‐earth ions to obtain white light emission.…”

“…[ 29–32 ] Tellurium oxide glasses optical properties such as high refractive index, high transparency, and low phonon energy are desired for trivalent lanthanide ions host matrix to obtain PL properties adequate for LEDs applications. [ 29–32 ] Sm 3+ ‐doped tellurite glasses have been widely studied as reddish‐orange‐emitting phosphor for LED applications and often are combined with other rare‐earth ions to obtain white light emission. [ 29,31,33,34 ]…”