Photoluminescence study of Y2O3:Er3+-Eu3+-Yb3+ phosphor for lighting and sensing applications

Abstract

The Er3+, Eu3+, and Yb3+ codoped Y2O3 phosphors have been synthesized by combustion synthesis process. For the structural information, the XRD analysis of the developed phosphor has been done. The frequency upconversion (UC) emissions in the codoped Y2O3 phosphor on excitation with 980 nm diode laser in the visible region have been performed and explained on the basis of excited state absorption and energy transfer process. The mechanism responsible in UC emissions was observed to involve two photon absorption and efficiency of the UC luminescence is significantly enhanced by introducing the Yb3+ ions. The tunability in colour of emitted radiation has been visualized by chromaticity diagram on increasing power of excitation source. The temperature sensing behaviour of developed phosphor material has been investigated using fluorescence intensity ratio technique.

Microwave assisted synthesis of monodispersed Y2O3 and Y2O3:Eu3+ particles

“…There are no absorption bands observed for HCO 3 À and NO 3 \Àt À groups in the spectra suggesting the composition of the as prepared particles are Y(OH)CO 3 and they maintain the same structure till 300 1C [9]. After calcining at 500 1C the peaks corresponding to C-O and O-H vibrations reduce in intensity and disappear completely at 800-900 1C.…”

“…The formation of solid phase is governed by controlled generation of precipitating ligands mainly OH À and CO 3 2 À ions thorough the slow and homogeneous decomposition of urea at temperatures above 80 1C [14,33]. For the particles synthesis, all reactant solutions heated up to the desired reaction temperature in less than 90 s using fast and homogenous microwave heating.…”

“…Phosphors are made of an inert and chemically stable host doped with small amount of rare earth ions (Re 3 þ ) known as optically excited activators [2]. Y 2 O 3 is preferred as the host material due to its excellent chemical durability, high thermal stability, high refractory property, corrosion resistivity, photochemical stability, broad transparency range (0.2-8 μm) with a wide band gap (5.8 eV), high thermal conductivity, low phonon energy, high refractive index and dielectric constant [3,4]. Additionally, similar chemical properties and ionic radius of Y 3 þ and Re 3 þ make it a preferred choice as a host material [5].…”

“…Recently, much attention has been paid to the fabrication of Y 2 O 3 :(Re 3 þ ) compounds due to their potential applications in display devices such as cathode ray tubes (CRTs), liquid crystal displays (LCDs), field emission displays (FEDs), plasma display panels (PDPs) [3,6], temperature sensing devices [7], and solid state lasers [8]. Also recently these materials found applications in biomedical area as biolabels [9], bioimaging probes [10], and in medical diagnostics [11].…”

Multifunctional MWCNTs–NaGdF4:Yb3+,Er3+,Eu3+ hybrid nanocomposites with potential dual-mode luminescence, magnetism and photothermal properties

“…For example, Rai et al studied the up-conversion luminescence of Y 2 O 3 :Er 3+ ,Eu 3+ ,Yb 3+ phosphor and investigated the co-doping influence of Yb 3+ ions. 43 Wang et al have successfully synthesized the NaYF 4 :Yb 3+ ,Er 3+ ,Eu 3+ nanocrystals, and 45 researched the energy transfer process of the up-conversion. 44 Here, we focus on the dual-mode luminescence in the Yb 3+ ,Er 3+ ,Eu 3+ tri-doped NaGdF 4 In the present work, we report a facile and novel route to synthesize a kind of multifunctional nanomaterial MWCNTs-NaGdF 4 :Yb 3+ ,Er 3+ ,Eu 3+ nanocomposites (NCs) with magnetic, photothermal and dual-mode optical properties.…”