Li2O-2B2O3 doped with Er3+, Yd3+ and Dy3+ and containing Ag and Cu nanoparticles using for emission stabilization under high temperatures

A family of sixteen samples of lithium diborate glass doped with Er ³⁺, Yb ³⁺, Dy ⁺³ and containing Ag and Cu were synthetized by melt-quenching technique. SEM micrograph is presented. X-ray diffraction patterns of all samples reveal the amorphous structure, which confirms their non-crystalline nature. Physical properties such as density, molar volume and boron-boron separation of amorphous materials are shown. UV–Vis-IR absorption spectra of all samples were recorded and display the characteristic bands of the used rare earths, all absorption bands present an enhancement with increasing metallic nanoparticles concentration. The estimated optical energy band gap of the samples was obtained using the Tauc´s plot method. Emission spectra of doped samples were collected in the temperature range from 30 to 180 °C. The results of emission under temperature indicate that the addition of metallic nanoparticles (Ag and Cu) in glass matrices are responsible for emission stabilization in samples when the temperature is increased.