Facile synthesis and effect of samarium doping on structural and optical properties of barium strontium orthosilicate nanophosphors with potential implications in optoelectronic and display optimization

The barium strontium orthosilicate [BaSr(1-x)SiO4:xSm3+] phosphors for various concentrations have been successfully prepared by using combustion synthesis approach. The synthesized samples have been characterized by using various techniques such as X-ray diffraction (XRD), photoluminescence spectroscopy, UV-Vis spectroscopy, high-resolutions tunneling electron microscopy (HRTEM) and scanning electron microscopy (SEM). By comparing the patterns obtained from XRD of the samples with the data from the JCPDS no. 00-154-0392 that was available, orthorhombic phase formation was verified. The images obtained by scanning electron microscopy (SEM) showed the porous nature of the phosphor. The HRTEM analysis confirmed the size of the particle of the nanophosphor. When the material is excited at a wavelength of 404 nm, the photoluminescence spectra of BaSrSiO4:Sm3+ demonstrate the presence of four distinct emission peaks, which may be attributed to the transitions from the 4G5/2 energy level to the 6HJ energy levels (where J takes on the values of 5/2, 7/2, 9/2 and 11/2). The hypothesis proposed by Dexter demonstrates that the phenomenon of concentration quenching between the Sm3+-Sm3+ ions present in the phosphors arises from the dipole-quadrupole interaction between them. Its deep reddish-orange emission is shown by the estimated Commission Internationale de I'Elcairage color coordinates, indicating its applicability in display enhancement and other optoelectronic applications. This study presents a comprehensive analysis of the luminescence characteristics of the synthesized phosphors, providing a full account of these features for the first time.