Enhanced photoluminescence behaviour of Eu3+ activated ZnMoO4 nanophosphors via Tb3+ co-doping for light emitting diode

Abstract In the present study, structural and photo-luminescence studies of Eu 3+ and Tb 3+ co-doped ZnMoO 4 host matrix has been investigated in detail. ZnMoO 4 :Eu 3+ /Tb 3+ have been synthesized via a simple and cost effective co-precipitation method. XRD, Raman and FTIR studies confirmed its triclinic structure of Eu 3+ /Tb 3+ co-doped ZnMoO 4 host. Emission spectra of the measured samples corroborate the dominant electric dipole transition emission ( 5 D 0 - 7 F 2 ) intensity over magnetic dipole transition emission ( 5 D 0 - 7 F 1 ) intensity. Moreover, the improvement in red emission ( 5 D 0 - 7 F 2 ) for Eu 3+ (3 at%) and Tb 3+ (2 at%) and high asymmetric ratio ∼10.4 is observed which dictates it as a highly red emitter. Additionally, commission international de-I′ Eclairage (CIE) values approaches to NSTC. Color purity of red emission improves after Tb 3+ co-doping. Photoluminescence studies reveals that Tb 3+ acts as a sensitizer for the Eu 3+ activated ZnMoO 4 host matrix. Study reveals that Eu 3+ /Tb 3+ co-doped ZnMoO 4 can be excited by near UV device, which is bottleneck in the advancement of LEDs technology.