Combustion synthesis of Eu2+ and Dy3+ activated Sr3(VO4)2 phosphor for LEDs

Abstract

Combustion synthesis and photoluminescence (PL) characterization of Sr 3(VO4)2:Eu,Dy phosphors are presented in this paper. PL emission of Sr3(VO4)2:Eu phosphor shows green broad emission band centring at 511 nm and a red sharp band at 614 nm by excitation wavelength of 342 nm. The PL emission spectrum of Sr 3(VO4)2:Dy phosphor exhibits an intense blue emission peak at 479 nm, yellow broad band centring at 573 nm and red band at 644 nm by the excitation wavelength of 426 nm in near visible blue region. The excitation wavelength of Eu (342 nm) and Dy (426 nm) activated Sr 3(VO4)2 phosphor are well matched with the excitation of near UV excited solid state lighting and blue chip excitation of light emitting diodes, respectively. The effect of Eu2+ and Dy 3+ ions concentration on the emission intensity of Sr 3(VO4)2 was also investigated. The Sr 3(VO4)2:Eu is a potential green and red emitting phosphor as well as Sr3(VO4)2:Dy is blue and yellow emitting phosphor for solid state lighting i.e. white LEDs. The XRD and SEM characteristics of Sr3(VO4)2 materials was also reported in this paper. © Indian Academy of Sciences.