Spectroscopic study of Er3+-doped zinc-tellurite glass and opaque glass-ceramic

Author(s)

da Silva, L. N. Lindolfo ^[1] ; Torquato, Alisson ^[1] ; de Assis Jr, I. Nunes ; Dousti, M. Reza ^[2]

Affiliation

^[1] Univ Fed Rural Pernambuco UFRPE, Grp Opt Mat Funcionais, Unidade Acad Cabo de Santo Agostinho UACSA, Cabo De Santo Agostinho, PE - Brazil

^[2] de Assis Jr, Jr., I. Nunes, Univ Fed Rural Pernambuco UFRPE, Grp Opt Mat Funcionais, Unidade Acad Cabo de Santo Agostinho UACSA, Cabo De Santo Agostinho, PE - Brazil

• Document type: Journal article
• Source: SOLID STATE SCIENCES; v. 112, FEB 2021.
• Web of Science Citations: 0

Abstract

Er3+-doped zinc tellurite glass and glass-ceramic are prepared by simple melt-quenching technique and subsequent heat-treatments at two defined crystallization temperatures. The heat-treated sample at 460 degrees C converts to an opaque glass-ceramic with the formation of mainly Zn2Te3O8 and TeO2 crystalline phases. There is no peak observed corresponding to the ZnTeO3 phase. The effective bandwidth of the near-infrared emission band of Er3+ ions at around 1.5 mu m increases from 65 nm to 89 nm after exposing the sample to heat-treatment owing to the formation of different symmetry sites around Er3+ ions. The lifetime of this band decreases from 2.49 to 1.72 ms. The upconversion emission bands in ceramized sample show a red-shift, while the green to red upconversion intensity ratio decreases from 3 to 0.6, respectively, for glass and glass-ceramic samples. The mechanism behind this observation is discussed by possible energy transfer between Er3+ ions in the crystalline phase. (AU)

• FAPESP's process: 13/24064-8 - Structural and photophysical studies of tungsten phosphate glasses doped with rare earth ions and metallic nanoparticles
• Grantee: Mohammad Reza Dousti
• Support Opportunities: Scholarships in Brazil - Post-Doctoral