Structural and photoluminescence of Sm3+ doped La2O3 nanophosphor

摘要: La2O3:Sm3+ (1 – 9 mol %) nanophosphors have been prepared by solution combustion route using oxalyl-dihydrazide (ODH) as a fuel. The final product was well characterized powder X-ray diffraction (PXRD), Scanning electron microscopy (SEM ), Diffusion Reflectance Spectra etc. PXRD patterns confirm the formation of highly crystalline hexagonal phase structure. SEM studies show samples are high porosity, agglomerated and Nano-size (∼ 45 nm). direct energy band gap (Eg) values estimated from Kubelka-munk plot were found to be in range 4.94 5.16 eV. Photoluminescence (PL) 568, 613 655 nm emissions upon excited at 407 nm wavelength. emission peaks 568 nm is associated with transitions 4G5/2 → 6H5/2 whereas attributed 6H7/2 6H7/2. CIE coordinate lies within reddish orange region. CCT 2266K U’, V’, 0.2872, 0.540. Therefore, present phosphors may potential application LEDs phosphor.