Effect of Eu3+ doping on the structural and photoluminescence properties of cubic CaCO3

Luminescent properties and energy transfer of Gd3+/Eu3+ co-doped cubic CaCO3

“…3. All the samples exhibited absorption bands at 714 cm -1 , 873 cm -1 , and 1450 cm -1 , which are all the characteristic bands of calcite crystals based on the in-plane bend (υ1) and on the out-plane band (υ2) at 714 cm -1 and 873 cm -1 [23], respectively, and an anti-symmetry stretch (υ3) at 1450 cm -1 [24]. The strong absorption peak near 1450 cm -1 is assigned to the asymmetric stretching vibration of C-O [15].…”

Electrospinning fabrication and luminescence properties of Lu2O2S:Eu3+fibers

“…The two decay time indicate that Eu 3+ ions were located in two kinds of chemical environment in Lu2O2S fibers, one is on the surface and the other is in the ''bulk''. 36,37 The average decay time τ were calculated to be 4.37, 4.69, 5.42, 5.13 and 4.95 ms for Lu2O2S: xEu 3+ with x = 0.01, 0.02, 0.03, 0.04 and 0.05 respectively. As seen in Fig.…”

Simultaneous structure and luminescence property control of barium carbonate nanocrystals through small amount of lanthanide doping

“…4e. Upon UV light excitation, the electrons are excited from the valence band to the conduction band of BaCO 3 [30,31], where either these electrons can then be transmitted to the valence band, producing the blue emissions with maximum wavelengths at 405 and 429 nm (Fig. 4e, left), or the excitation energy could be transferred to Tb 3+ due to energy level match, [32] leading to the characteristic emissions of Tb 3+ ion (Fig.…”