Low-temperature luminescence properties of CaSO4:Dy

Synthesis and photoluminescence characteristics of Dy3+-doped ZnAl2O4 nanocrystals via a combustion process

“…By introducing RE ions into different lattices, the materials can find potential applications in different aspects as optical amplifiers or lasers, phosphors and photocatalysts, especially when the size of the particles is reduced to nanoscale [1][2][3]. Dy 3+ , as one of the most investigated ions, has been studied extensively because it provides two typical emission bands in blue (480 nm) and yellow (570 nm) regions, which are necessary for full color displays [4][5][6]. In addition, the emission probability of electric dipole transition is greatly affected by the crystal field and radial integral of 4f and 5d electrons [5].…”

Electron–hole and excitonic processes in CaSO4 doped with Gd3+, Tb3+ and Dy3+ luminescent ions

“…The intensity of (2.3-3.3)-eV bands decreases under electron irradiation, as one would expect for the intrinsic emission. The $3-eV emission was ascribed to the self-trapped excitons [7][8][9], which are formed at the recombination of conduction electrons with the holes undergoing self-trapping at oxygen ions via EPR-active SO 4 À centers [2,3]. The maximum of the main emission line ($4.05 eV) in the phosphorescence spectrum, detected using the maximum slit widths of a prism double monochromator after 40-min irradiation was stopped, is slightly shifted with reference to the 3.98 eV line of Gd 3+ in the CL spectrum.…”

“…Phosphors based on CaSO 4 are successfully used as highsensitive dosimetric materials at the detection of VUV radiation, X-and g-rays [1][2][3][4]. They are under thorough investigation with the purpose to find wide-gap spectral transformers of luminescence with quantum yield QY41 at the excitation by Xe-discharge resonant emission (8.44 eV) [4][5][6][7].…”

“…CaSO 4 -based materials also belong to few wide-gap dielectrics where the existence of selftrapping excitons with a complex structure is expected [5,[7][8][9]. The use of Ce 3+ [8,10], Dy 3+ [2,4], Pr 3+ [5], Tb 3+ [6] and Gd 3+ [11,12] ions (RE 3+ ) as luminescent probes allows to conclusively separate intrinsic and impurity emissions in various fluorides and oxides.…”

Optical and Physical Properties of Bismuth Borate Glasses Doped With Dy³⁺

“…However, the study of the physical properties of the ionic glasses has been paid little attention. Dy 3+ (4f 9 ) doped glasses have been considered as promising laser active materials able to emit radiation associated with the 6 H 13/2 → 6 H 15/2 transition of Dy 3+ ion around 3 µm (Praveen a et al,2008) .The active Dy 3+ ion provides two typical emission transitions that correspond to 4 F 9/2 → 6 H 15/2 (magnetic dipole) in blue (∼480 nm) and 4 F 9/2 → 6 H 13/2 (electric dipole) in yellow (∼570 nm) regions, which are also necessary for full primary color displays ( Barkyoumb et al, 1997;Tanabe et al, 1998;Yu et al, 2002;Lakshminarayana et al, 2008). In this study we report on optical, physical and structural properties of Dy 3+ ion-doped bismuth borate glass in formula (70-x)B 2 O 3 :30Bi 2 O 3 :xDy 2 O 3 (where x = 0.0-2.5 mol%).…”