Bakr, M.Kaynar, Ümit H.Ayvacıklı, M.Benourdja, S.Karabulut, Y.Hammoudeh, A.Can, N.2022-02-152022-02-1520200025-54081873-4227https://doi.org/10.1016/j.materresbull.2020.111010https://hdl.handle.net/20.500.14034/132Sm3+ and Dy3+ activated Ca3Al2O6 phosphors were produced through a gel combustion method using Urea + beta-Alanine, Urea, and Urea + Glycine as fuels. The crystal structure and the phase purity of the obtained materials were characterized by X-ray powder diffraction (XRD). Ca3Al2O6 :Sm3+ phosphor shows characteristic emission lines (565 nm, 602 nm, 649 nm, and 714 nm) in the orange red region assigned to (4)G(5/2) -> H- 6(J) (J = 5/2, 7/2, 9/2, 11/2) transitions of Sm3+. The strongest peak is located at 602 nm. Emission spectra of Ca3Al2O6 :Dy3+ show that there are two dominant peaks centered at 480 nm and 573 nm emitting blue and yellow light. Optimum doping concentrations of Sm(NO3)(3) and Dy(NO3)(3) are 0.01 % and 0.03 %, respectively. The concentration quenching mechanism is verified to be a dipole-dipole interaction as the type of energy transfer among Sm3+-Sm3+ and Dy3+-Dy3+ ions. The critical distance is also calculated to be 24.19 angstrom and 16.77 angstrom, respectively.eninfo:eu-repo/semantics/closedAccessCa3Al2O6XRDGel combustionPhotoluminescenceConcentration quenchingSm3+CathodoluminescenceBrightEu3+Article10.1016/j.materresbull.2020.111010132Q2WOS:0005688790000202-s2.0-85088217968Q1