Structural and tunable optical properties of LiMgPO4:Tb3+ phosphor fabricated by sol-gel method
| dc.contributor.author | Kati, MI | |
| dc.date.accessioned | 2024-07-18T11:40:25Z | |
| dc.date.available | 2024-07-18T11:40:25Z | |
| dc.description.abstract | In the study, Tb3+-doped LiMgPO4 phosphors between .10 and 5 mol% were successfully synthesized by the sol-gel process. The crystal structure of Tb3+-doped LiMgPO4 was identified by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) analyses. The XRD results for LiMgPO4 ceramics doped with Tb3+ indicated a single-phase up to 5 mol%, accompanied by lattice shrinkage. An SEM analysis of LiMgPO4 samples showed that increasing Tb3+ concentration reduced grain size but did not cause any significant change in slightly angular and round grains. The emission intensity of phosphor increased from .10 to 5 mol%, and no concentration quenching was observed. The luminescence color of LiMgPO4:Tb3+ phosphor can be tuned from blue to green through cross-relaxation with the increase in Tb3+ concentration. The photoluminescence emissions of LiMgPO4:Tb3+ on the CIE diagram shifted from blue to green as the Tb3+ concentration increased. The color purity of the 5 mol% Tb3+-doped phosphor showing the strongest emission was measured at 22.71%, whereas the color-correlated temperature parameter was found to be 5573 K. The phosphors exhibited bi-exponential decay profiles, and the observed lifetimes of D-5(3) decreased with the increase of Tb3+, where the cross-relaxation effect increased. The quantum efficiency (eta(QE)) of the phosphor was determined using the cross-relaxation process. For Tb3+ concentrations ranging from .1 to 5 mol%, the eta(QE) of the D-5(3) state decreased from 62.49% to 28.29%. The research may offer a new perspective and new approaches for tuning luminescence in Tb3+-doped phosphors. | |
| dc.identifier.issn | 1546-542X | |
| dc.identifier.other | 1744-7402 | |
| dc.identifier.uri | http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/2391 | |
| dc.language.iso | English | |
| dc.publisher | WILEY | |
| dc.subject | PHOTOLUMINESCENCE PROPERTIES | |
| dc.subject | LUMINESCENCE PROPERTIES | |
| dc.subject | OSL PHOSPHOR | |
| dc.subject | TB3+ | |
| dc.subject | LIMGPO4/TB,B | |
| dc.subject | TEMPERATURE | |
| dc.subject | MECHANISM | |
| dc.subject | SR | |
| dc.title | Structural and tunable optical properties of LiMgPO4:Tb3+ phosphor fabricated by sol-gel method | |
| dc.type | Article |