Optical properties of Ln2+,3+ (Ln=Eu2+, Ce3+, Dy3+ and Ce3+/Dy3+) doped BaMg2Al6Si9O30 nanophosphor

This paper presents the synthesis and characterizationof novel Eu2+, Ce3+, and Dy3+ doped BaMg2Al6Si9O30 nanophosphors by combustion method at 550 degrees C. Eu2+ and Ce3+ ions show the broadband emission assigned due to the 5d-4f transition. Whereas, Dy3+ activated BaMg2Al6Si9O30 nanophosphor shows the characteristic emission bands due to f-f transition respectively. From the observed excitation and emission bands of donor and acceptor, we have studied the critical distance of energy transfer (ET) in Ce3+/Dy3+ ions. Further, the phosphor was well characterized by XRD, SEM, TEM for the confirmation of phase purity, surface morphology and crystallite size respectively. The band gap of the material is measured from the diffuse reflectance spectra. From emission characteristics, it is seen that the prepared nanophosphor may be a promising candidate for solid-state lighting.