Structural and optical characterization of RE (Eu2+, Ce3+) doped SrMg2Al6Si9O30 nanocrystalline phosphor

Abstract

This article present the reports on optical study of Eu2+ and Ce3+ doped SrMg2Al6Si9O30 phosphors, which has been synthesized by combustion method at 550 °C. Here SrMg2Al6Si9O30:Eu2+ emission band observed at 425 nm by keeping the excitation wavelength constant at 342 nm, whereas SrMg2Al6Si9O30:Ce3+ ions shows the broad emission band at 383 nm, under 321 nm excitation wavelength, both the emission bands are assigned due to 5d–4f transition respectively. Further, phase purity, morphology and crystallite size are confirmed by XRD, SEM and TEM analysis. However, the TGA analysis is carried out to know the amount of weight lost during the thermal processing. The CIE coordinates of SrMg2Al6Si9O30:Eu2+ phosphor is observed at x = 0.160, y = 0.102 respectively, which may be used as a blue component for NUV-WLEDs. The critical distance of energy transfer between Ce3+ ions and host lattice is found to be 10.65 A.