Luminescent properties of nanoparticles YPXV1−XO4:Dy phosphors

Influence of Dy3+ Ions on the Optical Characteristics of Nanoscaled Y1−xDyxVO4 Phosphors

“…(3) These three peaks located at 352, 366, and 390 nm are the result of the following electron transitions: 6 H 13/2 → 4 M 15/2 + 6 H 7/2 , 6 H 13/2 → 4 I 11/2 , and 6 H 13/2 → 4 M 19/2 , respectively. (11,16) The absorption peak located at 352 nm is the strongest one of these three and is chosen as the excitation wavelength for the following PL measurements. Between these five samples, the YVO 4 phosphor with 0.8% Dy 3+ reveals the strongest absorption.…”

“…After 30 h, phosphors with average particle size of 30 to 70 nm could be obtained. (11) Some research teams used solid state methods to obtain YVO 4 -based phosphors. Under high-temperature treatment for 12 h, phosphors with a particle size around 0.5 μm could be synthesized.…”

Magnetic and photoluminescence properties of Fe3O4@SiO2@YP1−xVxO4:Dy3+ nanocomposites

“…Moreover, the presence of the VO 4 3− absorption in the excitation spectrum of Dy 3+ indicates that an energy transfer occurs from VO 4 3− ions to Dy 3+ ions in YVO 4 :Dy 3+ , and the energy transfer is very efficient because the emission of VO 4 3− is not observed and only the emission of Dy 3+ is observed upon excitation at the VO 4 3− . The energy transferring from VO 4 3− to Dy 3+ is dominated by exchange interaction at room temperature like VO 4 3− -Dy 3+ energy transfer in YVO 4 [22]. Although the silica matrix acts as a barrier to protect YP 0.1 V 0.9 O 4 :Dy 3+ from quenching completely, Fe 3 O 4 also products some effects to a certain extent.…”

“…Functionalization of YP0.1V0.9O4:Dy 3+ on the template free Fe3O4@SiO2 was achieved according to the reported process with the doping concentration of Dy 3+ of 1 mol% to Y 3+ in YP0.1V0.9O4:Dy 3+ [21][22][23]. Typically, 0.223 g (0.9 mmol) of Y2O3, 0.0037 g (0.01 mmol) of Dy2O3, 0.023 g (0.2 mmol) NH4H2PO4 and 0.2103 g (1.8 mmol) of NH4VO3 were dissolved in dilute HNO3.…”

Multiwavelength excited white-emitting phosphor Dy3+-activated Ba3Bi(PO4)3

“…Therefore, the color tone of Dy 3+ -doped phosphors can be modified by changing the relative intensity of the yellow light through crystal field engineering. At present, There are many hosts that can be activated by Dy 3+ ions, such as borates [2][3][4], phosphates [5][6][7][8], aluminates [9,10], silicates [11][12][13], vanadates [14][15][16], and molybdates [1]. Among these phosphors investigated, phosphates are good candidates due to their low synthetic temperatures, stabilities, and low costs.…”