Abstract
The calcium aluminates doped with Eu ions, Ca5Al8O14: Eu, phosphors are prepared by the combustion method. The formation of crystalline aluminates was confirmed by X-ray diffraction pattern. The prepared phosphors were characterized by SEM, TGA, DTA, particle size analyzer and Photoluminescence (PL) techniques. From the UV-excited luminescence spectra it was found that the Eu ions acts as a luminescent centre with luminescence at the blue (λ max = 470 nm) region due to 4f 65d 1 → 4f 7 transition. The excitation spectra show the broad band at 355 nm wavelength (λ em = 470 nm). The excitation 355 nm is a mercury free excitation and therefore Ca5Al8O14: Eu may be useful for the solid state lighting phosphor in lamp industry.
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Deshmukh, A.D., Dhoble, S.J., Godbole, S.V. et al. Intense blue-emitting Ca5Al8O14: Eu phosphor for mercury free lamp. Indian J Phys 83, 423–428 (2009). https://doi.org/10.1007/s12648-009-0023-1
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DOI: https://doi.org/10.1007/s12648-009-0023-1