Abstract
Trivalent bismuth and trivalent terbium ions doped CaYGaO4 were prepared. The crystal structure, phase purity, photoluminescence, decay curves, and emission spectra under various temperatures were investigated. The six-coordinate Ca2+ and Y3+ ions are occupied by Bi3+ ions, while Tb3+ ions take up the six-coordinate Y3+ ions in the CaYGaO4:Bi3+,Tb3+ phosphor. The emissions of trivalent bismuth (3P1 → 1S0) and trivalent terbium ions (5D4 → 7F5) excited by 320 nm were observed. The analysis of spectra and decay curves demonstrated that Bi3+ could transfer energy to Tb3+ via electric dipole-quadrupole interaction. By altering the concentration of trivalent terbium ions, the emitting color of phosphor was tuned from blue to green. The temperature sensing property of CaYGaO4:Bi3+,Tb3+ was described, and its relative sensitivity at 303 K achieves a maximum of 0.61% K−1. According to the results, CaYGaO4:Bi3+,Tb3+ is a potential material for color tunable emission and temperature sensing.
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 callDisclaimer: 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.
