Colour tuning in Sm3+ activated and Sm3+/Eu3+ co-activated SrBi4Ti4O15 phosphors for w-LED applications

SrBi4Ti4O15 (SBT) phosphors activated by Sm3+ and co-activated by Eu3+ have been synthesized in the current research using a straightforward solid-state reaction technique. X-ray Diffraction (XRD) confirms the sample's crystallinity. Scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX), and elemental mapping have been used to analyse the morphology and elemental composition of the synthesized phosphor. Fourier-transform infrared spectroscopy (FTIR) analysis has confirmed the vibrational characteristics of the as prepared phosphor. Photoluminescence studies show increase in luminescence intensity in case of Sm3+/Eu3+ co-activated phosphors as compared with singly doped Eu3+ and Sm3+ activated SBTO phosphors. Colour tunability was also observed from reddish-orange to pure red region when Sm3+ activated phosphors were co-activated with Eu3+ ions. These outcomes demonstrate that SrBi4Ti4O15 phosphors activated or co-activated with Sm3+ and Eu3+ can be deployed in w-LEDs and other display devices applications.