Photoluminescence decay curve analysis of some rare earth doped CeO2 phosphors

Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

“…CeO 2 has a cubic structure of the fluorite type with space group Fm-3m, formed by one Ce 4+ cation coordinated by eight O 2− anions [15]. In the literature, it is reported several promising applications for CeO 2 as a catalyst to reform vapor of propylene glycol in microreactors [16], gas sensor [17], opto-magnetic [18], catalysis of NO reduction [19], CO oxidation [20], electrolyte for solid oxide fuel cells [21,22], antibacterial agent [23,24] and phosphors [25][26][27], for example. Different routes of synthesis are used for CeO 2 to achieve these interesting properties and applications such as solid state reaction [28,29], sol-gel [30], coprecipitation [31], conventional hydrothermal [32], microwave-assisted hydrothermal [33,34], sonochemistry [35] and ball milling [36].…”

Europium doped Sr2YNbO6 double perovskite phosphor for photoluminescence and thermoluminescence properties

“…Figure 7 shows the decay curves measured for the excitation wavelengths 274 nm, 396 nm, and 467 nm, and the emission wavelength 612 nm. The decay curves for the charge transfer excitation wavelength 274 nm were fitted through the double exponential function given in Equation (4) [ 49,50 ] : where τ 1 and τ 2 are the decay constants for the fast decay and slow decay exponential components of the PLE day curve, respectively, and A 1 and A 2 were the fitting constants. The average decay lifetime (τ) for the double exponential curve was calculated using the equation, .…”

“…Figure 7 shows the decay curves measured for the excitation wavelengths 274 nm, 396 nm, and 467 nm, and the emission wavelength 612 nm. The decay curves for the charge transfer excitation wavelength 274 nm were fitted through the double exponential function given in Equation ( 4) [49,50] :…”