Low temperature thermoluminescence behaviour of Y2O3 nanoparticles

Efficient ab initio quantum mechanical simulations of structural stability and vibrational properties of bulk, monolayer and (n,0) nanotubes: Yttrium sesquioxide Y2O3

“…The band at 326 cm −1 is associated with an E g mode whereas the band at 431 cm −1 is assigned to an A g mode and the band at 248 cm −1 corresponds to an F g mode. The experimental Raman spectrum of the prepared Y 2 O 3 nanoparticles shows four main Raman bands at 175, 385, 484, and 606 cm −1 in consistence with our predicted data and previously reported results . All computed IR modes are of F u symmetry, the experimental lines with wavenumbers up to 400 cm −1 are in compliance with the DFT/B3LYP simulated spectrum.…”

“…The calculated lattice parameter, a = 10.73 Å, is in good agreement with our experimental data. In fact, inspecting this value shows a deviation of 2% from the experimentally available results, which indicates the reliability in predicting structural parameters for such systems. Therefore, the computed bond lengths Y─O are found to be for the 24d site Y1─O = 2.27 Å, 2.30 Å and 2.36 Å and for the 8b site Y2─O = 2.31 Å, which are also fairly consistent with available experimental data .…”

Synthesized Li2B4O7: Mg,Cu nanoparticles: a suitable thermoluminescence dosimeter for detection of high doses of gamma rays

“…Generally, Li2B4O7 (LTB) as a borate compound is used in the dosimetric application but it does not comply with all the requirements so studies are still being continued to improve its properties [12][13][14][15][16][17][18]. Over the past few years, attempts have been devoted to TL properties of nanomaterials because of their exceptional TL response compared with their bulk counterparts [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. The basic problem with the conventional TL materials is saturation of trapping states at high absorbed doses, which causes the TL response to become sub-linear in high radiation exposure.…”

Hydrothermal method for Y2O3:Eu3+ uniform nanophosphors with different templates

“…In recent years, luminescent materials have attracted much attention for their wide applications, such as solid-state lighting (SSL) devices, light emitting diodes (LEDs), cathode-ray tubes, biomedical imaging, luminescent solar concentrators (LSCs) and sensing applications, etc. [1][2][3][4][5] In particular, Lanthanide as activators-doped luminescent materials are universally used due to their sharp and intense emission peaks, high color purity and long luminescent lifetime. 6 Among the host materials, Y 2 O 3 is an excellent select for doping with trivalent lanthanides.…”

“…7,8 Moreover, it presents many unique properties such as excellent chemical and physical stability, large band gap (∼5.6 eV) and high refractive index (>1.9) among others. 3,9 Europium-doped Y 2 O 3 , as an excellent red-emitting phosphor, has been successfully synthesized in various methods like sol-gel, 10 co-precipitation, 11 hydrothermal, 12 high temperature solid-state, 13 spray pyrolysis 14 and microwave method. 15 In these methods, the hydrothermal method has many advantages such as simple operation methods and equipment, relatively low reaction temperature, green and cheap reagent, high efficiency and low energy consumption.…”