Size-Dependent Persistent Luminescence of YAGG:Cr Nanophosphors.

In the current work, YAGG:Cr nanophosphors were synthesized by the Pechini method and then annealed at different temperatures in the range 800-1300 °C. The structure and morphology of the samples were characterized by X-ray Powder Diffraction (XRPD). The lattice parameters and average crystalline sizes as site occupation by Al and Ga ions were calculated from the Rietveld refinement data.

Hole Trapping Process and Highly Sensitive Ratiometric Thermometry over a Wide Temperature Range in Pr-Doped NaLaTiO Layered Perovskite Microcrystals.

We demonstrate a potential optical thermometric material, Pr-doped triple-layered perovskite NaLaTiO microcrystals, which promises a remarkable performance in temperature sensing over a wide temperature range (125-533 K), with a maximum relative sensitivity of 2.43% K at 423 K. Both temperature and high-pressure dependent photoluminescence measurements were performed for this compound.