Structural and Spectroscopic Properties of δ‐Y₂Si₂O₇ Nanopowders Activated with Nd³⁺ Ions

Abstract

Phosphors of δ‐Y2Si2O7 doped with Nd3+ ions were prepared in the SiO2–Y2O3 binary systems using the solgel technique. Nano‐sized crystalline phosphor powders were obtained by annealing the dried gels at 1480°C. The average grain sizes of the NYS1, NYS2, NYS3, and NYS4, powders were estimated to be 44.1, 41.3, 48.1, and 53.2 nm from the grain size distribution curves, respectively, and these results were confirmed by transmission electron microscope measurements. The spectroscopic properties of the powders were studied by measuring the luminescence spectra, and the decay curves of the 4F3/2 emission level were measured at room temperature.

Photoluminescence characterization and heat treatment effect on luminescence behavior of BaTa2O6:Dy3+ phosphor

“…Therefore, most rare‐earth elements are generally preferred for phosphor and laser materials production as dopants. Potential application fields of rare earth‐doped phosphor materials include solar panels, field‐emission displays (FEDs), scintillation, cathode‐ray tubes (CRTs), vacuum fluorescent displays (VFDs) and white light‐emitting diodes (W‐LEDs) . White LEDs are generally considered to be the new generation light sources, which are able to replace the fluorescent lamps, because of their excellent features in terms of low energy consumption, fast response, mercury free, high efficiency, low voltage adjustability, environmental‐friendly and energy‐saving devices.…”

Concentration and Cyrstalline Phase Effects on the Spectroscopic Properties of Sol-Gel Synthesized Er³⁺:Y₂Si₂O₇ Nanopowders

“…Although, various rare earth-activated yttrium orthosilicates have been studied a lot [17][18][19][20][21][22][23][24][25][26][27][28] [25].…”

“…Rare earth elements (RE) doped, co-doped and tridoped Y2Si2O7 are crucial nanophosphors for lasers, light emitting diodes (LED), white LED and plasma display panel applications [13][14][15][16]. Although, various rare earth-activated yttrium orthosilicates have been studied a lot [17][18][19][20][21][22][23][24][25][26][27][28], there have been a few studies reported on the Er 3+ : Y2Si2O7. Diaz et al analyzed the luminescence properties of Y2Si2O7 : Dy phosphors prepared by a new pressureless hydrothermal route.…”

“…In our former studies, we have discussed the structural and spectroscopic properties of Y2Si2O7 : Nd and Y2Si2O7 : Yb phosphors [26,27] and the upconversion properties of Y2Si2O7 : Yb, Er nanophosphors obtained by sol-gel technique [28].…”

Magnetic effect on the phase properties of neodymium-activated yttrium disilicate nanomaterials

“…δ -Y 2 Si 2 O 7 crystallizes into an orthorhombic structure with the Pna 21 space group and assigns unique crystallographic sites to Y 3+ ions both with coordination number seven [4]. However, researchers focused on the optical spectroscopy properties of yttrium disilicates (Y 2 Si 2 O 7 ) [5][6][7][8][9][10][11][12][13] and no extensive study on the magnetic properties of yttrium disilicates when activated with neodymium has been observed in the literature. In this study, we first report on the magnetic properties of nanocrystalline α , γ , and δ polymorphs of yttrium disilicate (Y 2 Si 2 O 7 ) prepared by the sol-gel method.…”