Synthesis, structural and optical properties of Eu3+–doped Ca2V2O7 nanophosphors

Crystal structure and photoluminescent properties of BaZn1−Eu V2O7 nanoparticles

“…The frequency bands originating at 1600 cm À1 and 3400 cm À1 attributed to bending and stretching modes of water molecules due to adsorbed moisture by the powder are absent due to volatilization of H 2 O at high temperature. The absorption bands in the range 500e1025 cm À1 are assigned to stretching and bending vibrations of the VO 4 3À group [31,32]. The IR bands in the region 1020e740 cm À1 owing to VeO stretching vibrations while the band at 506 cm À1 owing to VeO stretching vibrations are observed.…”

Photoluminescent properties of Tb3+ doped GdSrAl3O7 nanophosphor using solution combustions synthesis

“…In addition, this short synthesis process generates intense heat, sufficient to produce fine well-crystallized phosphors. [29,30] Herein, to the best of our knowledge this is the first report on synthesis of terbium doped GdSrAl 3 O 7 nanophosphor at low temperature using solution combustion approach. It has been noticed that Gd 3+ ions in the host lattice acts as sensitizer for the luminescence, resulting in improved efficiency of phosphor due to efficient energy transfer from host to activator via intermediate energy levels.…”

Crystal structure and two types of Eu3+-centered emission in Eu3+ doped Ca2V2O7

“…And two strong f-f transition emission bands with the peaks at 613 and 621 nm were reported [16]. In the citrate-gel combustion method only one broad excitation band ranging from 200 to 350 nm was found, which was assigned to the charge transfer band from O 2À to V 5 þ , and also a highly intense peak at 612 nm was found [17].…”

“…In the hydrothermal method, the strong broad band peak at 280 nm was attributed to the absorption band of charge transfer from oxygen to the Eu 3 þ , and only one strong f-f transition emission at 610 nm was found [15]. In the combustion method, two excitation peaks at 305 and 400 nm were detected, which were assigned to the O-V CT and f-f transitions of Eu 3 þ , respectively [16].…”

“…Gu et al [15], Taxak et al [16] and Kumar et al [17] employed the hydrothermal, combustion and citrate-gel combustion methods to synthesize europium doped Ca 2 V 2 O 7 , respectively. Different luminescent properties of Ca 2 V 2 O 7 :Eu 3 þ were found using different synthesis methods.…”