Combustion synthesis of Na₂Sr(PO₄)F:Dy³⁺ white light emitting phosphor

Abstract

The synthesis, X-ray diffraction, photoluminescence, TGA/DTA and FTIR techniques in Dy(3+) activated Na(2)Sr(PO(4))F phosphor are reported in this paper. The prepared phosphor gave blue, yellow and red emission in the visible region of the spectrum at 348 nm excitation. CIE color co-ordinates of Na(2)Sr(PO(4))F:Dy(3+) are suitable as white light-emitting phosphors.

Synthesis of zinc phosphate and zinc ammonium phosphate nanostructures with different morphologies through pH control

“…Equilibrium was achieved in the reaction system after aging in the constant temperature water bath under a predetermined temperature. Under the equilibrium conditions, the small crystals constantly adjusted their shape to minimize the total surface free energy (φ = ∑σ i A i , φ is the total interfacial energy, σ i is the specific surface free energy on the surface i (interface), A i is the area of the crystal surface, Gibbs-Ulf Law) [32]. Eventually, small sheet zinc phosphate crystals assembled into flowerlike crystals.…”

A study of the luminescence in near UV-pumped red-emitting novel Eu3+-doped Ba3Ca3(PO4)4 phosphors for white light emitting diodes

“…Recently, several methods have been employed for the synthesis of polycrystalline phosphors in nanoscale: co-precipitation method [21], combustion method [22], sol-gel method [23] and others. Herein, we applied the single pot conventional solid state reaction method at high temperature to synthesize the Eu 3+ :Ba 3-Ca 3 (PO 4 ) 4 nanocrystals.…”

Photoluminescence properties of LiBaPO4:M3+ phosphor for near‐UV light‐emitting diode (M = Eu and Dy)

“…Therefore, it can be seen that the optimum concentration of Dy 3+ in LiBaPO 4 is 0.015. In general, the optical properties of rare earth-doped systems are often influenced by the structure of the matrix and the synthesis technique (33). The 4 F 9/2 → 6 H 13/2 transition is a hypersensitive electronic dipole transition (ΔJ = ±2) which has been strongly influenced by the coordination environment.…”