NIR luminescence from erbium doped (100−x)SiO2:xZnO powders obtained by soft chemical synthesis

Journal of Luminescence 170 (2016) 663–670

Fig.: (a) HRTEM image, and (b) histogram of the x=60 sample annealed at 1100 °C. Statistical histogram was obtained from the HRTEM images.

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Writers: L.J.Q. Maia,  J.C.V. Santos , J.F. Carvalho, R.R. Gonçalves , A.C. Hernandes , S.J.L. Ribeiro

Keywords: Nanostructured materials; Photoluminescence

Abstract: We present the structural and optical results of (100x)SiO2:xZnO compounds with x¼0, 20, 40, 60, 80, and 100, containing 1 mol% of Er3þ prepared by a simple chemical route. It was evaluated the crystallization effect on the erbium ions emission around 1533 nm due to 4 I13/2-4 I15/2 transition. Structural analyses using X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) techniques showed that the prepared material present crystalline phases, the ZnO hexagonal (Zincite) and Zn2SiO4 rhombohedral. The relative content of crystalline phases as well the optical emissions in the infrared region are dependent on the composition and heat treatments. High-resolution transmission electron microscopy revealed average 5 nm sized Zn2SiO4 nanocrystals homogeneously dispersed into amorphous silica-based matrix. The Er3þ doped Zn2SiO4 crystalline phase are the most promising material to be used in optical system.

Amanda Murgo
Sobre Amanda Murgo 134 Artigos
Educadora do Laboratório de Difusão Científica (LaDiC) do Grupo Crescimento de Cristais e Materiais Cerâmicos (CCMC/IFSC/USP) no âmbito das ações de Difusão Científica do CDMF. Assessora de Comunicação do CCMC/LaDiC/CDMF desde 2010. Bacharel em Filosofia pela Universidade Federal de São Carlos com estágio no Projeto "História da Ciência e Meio Ambiente - as demandas por energia através da História" (CCMC/IFSC/USP/CDMF) de abril de 2013 a julho de 2014. Atua ministrando cursos de Educação Ambiental em escolas de Rede Básica de Ensino e Educadores com a temática pelo CDMF até os dias atuais.