|About this Abstract
||MS&T23: Materials Science & Technology
||Solid-state Optical Materials and Luminescence Properties
||Study of Surface Effects in Yb3+ Doped Garnet Nanopowders for Understanding Grain Boundary Processes in Laser Ceramics: Fabrication and Spectroscopic Properties
||Vitalii Boiko, Sebastian Cieśla, Mariusz Stefański, Dariusz Hreniak
|On-Site Speaker (Planned)
A series of Yb3+ doped Y3(Al,Ga,Sc)5O12 powders were synthesized by the sol-gel method and subsequently annealed in air at selected temperatures between 900 and 1300 °C. Based on X-ray powder diffraction data, the influence of synthesis parameters on the size of individual grains is presented. The effect of Yb concentration and host matrix structure was analyzed by Raman spectroscopy. Analysis of excitation, emission and decay curves, indicated the influence of structural changes taking place in nanosized grains on non-radiative deactivation processes of Yb3+ ions. Since structural defects play an important role in energy loss processes, a trap analysis using thermostimulated luminescence (TSL) was carried out for all materials studied. TSL analyses with different irradiation doses and heating rates have identified the different natures of traps in the host material and their effects on optical properties, as well as on energy loss processes.
This work was supported by NCR&D, grant: WPCZ/1/SCAPOL/2021.