Physical, thermal, structural and optical properties of Dy 3+ doped lithium alumino-borate glasses for bright W-LED

White light emitting thermally stable bismuth phosphate phosphor Ca3Bi(PO4)3:Dy3+ for solid‐state lighting applications

“…The emission spectra consist of two main peaks centered at 484 nm (blue band) and 575 nm (yellow band) corresponding to transitions 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 of Dy 3+ ions, respectively. The emission bands 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 correspond to the magnetic dipole (MD) and forced electric dipole (ED) transitions of Dy 3+ ions, respectively . The emission intensity of MD transition does not depend on the crystal field of the host but forced ED transition strongly depends on the crystal field environment around Dy 3+ ions.…”

“…The emission bands 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 correspond to the magnetic dipole (MD) and forced electric dipole (ED) transitions of Dy 3+ ions, respectively. 51 The emission intensity of MD transition does not depend on the crystal field of the host but forced ED transition strongly depends on the crystal field environment around Dy 3+ ions. The intensity of yellow band is higher than the blue band, which may be due to the location of the active ions (Dy 3+ ) in low symmetry site environment without the inversion center in the host.…”

Fabrication, tunable fluorescence emission and energy transfer of Tm3+‐Dy3+ co‐activated P2O5–B2O3–SrO–K2O glasses

“…Optical studies show that the radiative properties of RE‐doped glasses are strongly dependent on the glass structure, which can be modified by appropriate network formers and modifiers. Among all glasses, oxide glasses with excellent optical performance and good thermal stability are attractive hosts . Introducing alkali, alkaline‐earth cations and RE ions, as glass network modified ions strongly affects the number of bridging oxygen and the conversion from BO 3 triangular units to more stable BO 4 tetrahedral units, and improves structural stability and preparation conditions in borate/phosphate glasses .…”

“…Introducing alkali, alkaline‐earth cations and RE ions, as glass network modified ions strongly affects the number of bridging oxygen and the conversion from BO 3 triangular units to more stable BO 4 tetrahedral units, and improves structural stability and preparation conditions in borate/phosphate glasses . Therefore, Tm 3+ /Dy 3+ doped phosphate fluorescence glasses containing B 2 O 3 have significant applications for solid state lighting due to good RE ions solubility, homogeneous light emitting, low production cost, free of halo effect, large excited cross section and better thermal stability . In this work, a series of Tm 3+ /Dy 3+ single‐ and co‐doped P 2 O 5 ‐B 2 O 3 ‐SrO‐K 2 O glasses were prepared, and the physical properties, glass structure, luminescence characteristics, energy transfer mechanism and thermal stability were systematically studied.…”

“…Fluorescence glasses doped with RE ions capture researchers' attention due to high transparency, easy preparation, strong mechanical hardness, excellent moisture resistance, thermal stabilities. [10][11][12] They can emit multi-colors or white light by doping different rear-earth (RE) under the appropriate excited wavelength due to the existence of the efficient 4f-4f and 4f-5d electronic transitions of RE ions. 4,[13][14][15] Many RE ions-doped glasses have been reported.…”