title: Synthesis and characterization of blue long-lasting BaCa2Al8O15:Eu2+, Dy3+ phosphor.
abstract: We have synthesized and characterized a new BaCa2Al8O15:Eu(2+),Dy(3+) phosphor prepared by the combustion method. X-ray diffraction, thermoluminescence, scanning electron microscope, time decay and optical spectral analysis photoluminescence excitation, emission spectra were used to characterize the phosphors. Broadband ultraviolet excited luminescence of the BaCa2Al8O15:Eu(2+),Dy(3+) was observed in the blue region (λ(max) = 435 nm) due to transitions from the 4f(6)5d(1) to the 4f(7) configuration of the Eu(2+) ion. Scanning electron microscopy has been used for exploring the morphological properties of the prepared phosphors. The BaCa2Al8O15:Eu(2+) phosphor has a blue afterglow when Dy(3+) ions were co-doped. The thermoluminescence spectra show that the Dy(3+) ion induces a proper trap in the phosphor with a depth of 0.67 eV and results in a long afterglow phosphorescence.
authors: Department of Physics, RTM Nagpur University, Nagpur 440033, India.
authors: A N
authors: AN
authors: Yerpude
authors: S J
authors: SJ
authors: Dhoble
authors: D
authors: D
authors: Haranath
mesh_terms: D000535:Aluminum / Q000737:chemistry; D001464:Barium / Q000737:chemistry; D002118:Calcium / Q000737:chemistry; D004419:Dysprosium / Q000737:chemistry; D005063:Europium / Q000737:chemistry; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis* / Q000737:chemistry*; D008163:Luminescent Measurements; D010100:Oxygen / Q000737:chemistry; D010316:Particle Size; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D049408:Luminescent Agents; D004419:Dysprosium; D001464:Barium; D005063:Europium; D000535:Aluminum; D010100:Oxygen; D002118:Calcium
keywords: BaCa2Al8O15; X-ray diffraction; long-lasting phosphor; photoluminescence; thermoluminescence