Upconversion and colour tunability of Gd2O3:Er3+ phosphor prepared by combustion synthesis method

UV Light Induced Thermoluminescence of Rare Earth doped Nanomaterials Y\(_2\)O\(_3\):Eu\(^{3+}\), Gd\(_2\)O\(_3\):Eu\(^{3+}\) and Gd\(_2\)O\(_3\):Er\(^{3+}\)

“…2) and increasing the activator concentration [9] did not change the crystalline monoclinic phase of the two prepared nanophosphors. It was in good agreement with observation given by other researches [2,3,8,10,11]. The main crystallite sizes of Gd 2 O 3 : Eu 3+ 7 mol% and Gd 2 O 3 :Er 3+ 0.5 mol% were 24 nm and 32.5 nm, respectively.…”

“…The characters of the glow peaks such as positions, shapes and intensities are depended on different parameters of the trapping states responsible for the TL, among them the activation energy E, the frequency factor s and the order of the kinetics associated with the glow peaks are the most important parameters. Recent studies on luminescent nanomaterials indicated their applicability in dosimetry of ionizing radiation, especially for the measurement of high doses [4,8,12]. In the present work, the thermoluminescence properties induced by UV radiation of Y 2 O 3 : Eu 3+ , Gd 2 O 3 : Eu 3+ and Gd 2 O 3 : Er 3+ nanophosphors fabricated by the above presented procedure have been investigated.…”

“…At the point of spontaneous combustion, the solution begins burning, vaporizes immediately, releases lot of heat and liberates carbon-and nitrogen oxides. Normally the combustion completed in a few minutes [4,8]. This method allows production of homogeneous phosphors with fine particle size at relatively low temperature, especialy in the case of EDTA as fuel (350˚C).…”

Challenging and development of phosphors for lighting applications

“…Generally, these properties could be improved by better crystallization and purifying materials. Current challenges on phosphors research to obtain desired phosphors for lighting application is briefly reviewed in Table 1 respectively on luminescent features and high quantum efficiency [2][3][4][5][6][7], reduced of RE usage for host phosphor [8][9][10][11][12][13][14][15][16][17], morphology and size [18][19][20][21][22][23][24][25][26][27][28][29][30], preparation/synthesis methods [9,[31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48], and new phosphors …”

“…[49][50][51][52][53][54] Phosphors are synthesized by various methods such as solid state, solution phase and aerosol phase. Several modification on the phosphors synthesis are sol-gel derived flux assisted, hydrolysis and oxidation method, molten salt synthesis, co-precipitation method, spark plasma sintering, high temperature ball milling, hydrothermal, solvothermal co-precipitation, microwave non-hydrolytic sol-gel, self-assemblies, flame-assisted spray pyrolysis and pulse combustion spray pyrolysis [9,[31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]. Generally, spray pyrolysis method provide high quality phosphors, however the disadvantage is low production rate.…”