Color tunable orange-red light emitting Sm3+ doped BaZrO3 nanopowders: Photoluminescence properties for w-LED applications

Abstract

In this communication, we report the orange-red light emitting Sm3+ ions doped BaZrO3 (BZO) nanopowders (NPs) prepared via green combustion synthesis route by utilizing the local available Aloe vera (AV) gel as the surfactant. For convenient to the readers, we represent BaZrO3:Sm3+ as BZOS. The cubic structure of the BZOS is confirmed by the results of powder X-ray diffraction (PXRD). The energy band gap values are studied by diffuse reflectance spectra (DRS) plots and found to be in the range of 4.71–5.55 eV. The spherical structure of the fabricated nanopowders is analyzed by means of scanning electron microscope (SEM) images. Transmission electron microscope (TEM) image are castoff to evaluate the particle size of the prepared powders. The crystallinity and interplanar distance are analyzed by selected area diffraction (SAED) and high-resolution TEM (HRTEM) images. The luminescence studies are performed at RT. The strong absorption in NUV spectral region is observed. Upon excitation at 403 nm wavelength the emission peaks centered at 565, 607 and 649 nm ascribed to Sm3+ ions 4f-4f characteristics. The explanation for this quenching of focus has been explored in depth. In the pure orange field, the pixel coordinates (0.579, 0.419) for improved BZO: Sm3+ phosphor lie. The CP levels are also calculated and observed to be ~ 90 percent. The quantum efficiency of the prepared nanopowders is found to be ~ 88. 62%. The above findings substantiate the ability of BZO: Sm3+ phosphor to be used in photovoltaic applications as a high thermal stability orange-red light producing element.