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.