Structural and luminescence studies on thermally stable Bi ³⁺ ‐activated Ba ₃ MoTiO ₈ phosphors for near UV‐pumped w‐LED applications

Abstract This research presents the outcomes of diverse morphological and photoluminescence (PL) studies performed on Bi ³⁺ ion–doped Ba ₃ MoTiO ₈ phosphors prepared via the conventional solid‐state reaction method. Phase assessment was carried out via the X‐ray diffraction (XRD) studies. Field emission scanning microscopy (FE‐SEM) and energy‐dispersive X‐ray analysis (EDAX) have been used to study the surface morphology anda elemental composition. Fourier transform infrared spectroscopy (FT‐IR) was used to study the character and vibrational frequencies of bonds in the phosphor lattice. Room‐temperature PL was performed under 275 and 386 nm excitations, displaying a broad band in the blue region corresponding to the ³ P ₁ → ¹ S ₀ transition of Bi ³⁺ ions. The Commission Internationale de L'Eclairage coordinates and correlated color temperature values show that the as‐prepared phosphors emit in the blue vicinity. The decay curves under both excitation wavelengths show a single exponential behavior. Temperature‐dependent PL studies confirmed the high thermal stability of the phosphor. We want to endorse these phosphors as a blue‐emitting component in white light‐emitting diodes (w‐LEDs) and solid‐state lighting (SSL) applications.