Blue, yellow and orange color emitting rare earth doped BaCa2A18O15 phosphors prepared by combustion method

Eu2+, Dy3+, Sm3+ activated BaCa2Al8O15 phosphors were prepared by the combustion method. The phosphor powders were well characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and photoluminescence (PL) spectrophotometer. Photoluminescence spectra of BaCa2Al8O15:Eu2+ phosphors show emission wavelength at 435 nm that corresponds to 4f(6)5d(1)-> 4f(7) transition of Eu2+ ion by keeping excitation wavelength extending broad-band from 270 to 400 nm centered at 334 Rm. The Dy3+ doped BaCa2Al8O15 phosphors shows blue emission (485 nm) and yellow emission (566 nm) under the excitation of 347 nm, corresponding to the F-4(9/2)->(6)H1(5/2) transition and F-4(9/2)-> H-6(13/2) transition of Dy3+ ions, respectively. The Sm3+ doped BaCa2 Al8O15 phosphors have shown strong orange emission at 604 nm corresponding to the (4)G(5/2)-> H-6(7/2) transition of Sm3+ with intense excitation wavelength at 406 nm. Scanning electron microscopy has been used for exploring the size and morphological properties of the prepared phosphors. The obtained results show that the phosphors have potential application in the field of solid state lighting. (C) 2014 Elsevier B.V. All rights reserved.