Análise térmica e óptica de íons de Nd e Yb em matriz PANK e seus efeitos para aplicações ópticas inovadoras

Abstract

The present work employs thermoluminescent methodologies applied to a phosphate glass (PANK) matrix doped with Nd³⁺ and Yb³⁺ rare-earth ions, aiming to determine the thermo-optical properties of the system, whose concentrations, in weight percentage, were systematically varied according to the xNd (4–x)Yb ratio, with x = 0, 1, 2, 3, and 4. The experimental analyses consisted of investigating the excitation and de-excitation processes of the 4f electrons of the dopant ions through measurements of the luminescence peak, the emission ratio of each band, and the de-excitation lifetime. The obtained results enabled the evaluation of luminescence dynamics, energy transfer processes between the ions, the enhancement of emissive bands as a function of temperature variation, and the identification of potential technological applications of the material. Among the employed techniques, absorbance, photoluminescence (PL), and average lifetime measurements are highlighted.