Abstract
BaGd2O4 (BG):Sm3+ nanophosphors were synthesized by a solvothermal reaction method. The powder X-ray diffraction pattern confirmed their orthorhombic structure, and the morphological studies were carried out by taking the scanning and transmission electron microscopy images. The photoluminescence (PL) emission and PL excitation (PLE) spectra were investigated as a function of Sm3+ ion concentration. The PLE spectra revealed both Gd3+ and Sm3+ excitation bands in the shorter and longer wavelength regions, indicating that the efficient energy transfer occurred from the Gd3+ to Sm3+ ions in the BG host lattice. The PL spectra exhibited an intense orange emission due to (4G5/2→6H7/2) transition along with two other moderate intense emission peaks due to the (4G5/2→6H5/2) and (4G5/2→6H9/2) transitions. Based on the emission performance related to (4G5/2→6H7/2) transition, the Sm3+ ion concentration was optimized to be at 1mol%. The low-voltage cathodoluminescent (CL) measurements were also performed for BG:1mol% Sm3+ nanophosphors as a function of accelerating voltage and filament current. From the CL spectra, the reddish-orange emission was observed. The Commission International De I-Eclairage chromaticity coordinates of BG:Sm3+ nanophosphors were found to be very close to the chromaticity coordinates of Nichia Corporation developed amber light-emitting diodes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
