Author(s)

Joan Reyes¹, Dulce Y. Medina¹, Miriam Aguilar¹, Miguel A. Barron¹, Elizabeth Garfias¹, Angel de Jesus Morales²

¹Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Azcapotzalco, Reynosa, México.
²Instituto Politécnico Nacional, ESIQIE, Mexico City, México.

The main drawbacks of fluorescent activated lanthanide luminescent materials in practical optoelectronic applications are the high cost of raw material and the limitation of a specific color depending on the lanthanide ion. In this work, the synthesis of red, white and blue light emitting composite powders of Al₂O₃:Eu³⁺@SiO₂ were successfully synthesized by the hydrolysis and condensation reactions of TEOS as the raw precursor of silica matrix on the Al₂O₃:Eu³⁺ surface. With the aim to change the CIE coordinates different weight ratios of Al₂O₃:Eu³⁺/SiO₂ powders from 13Al/87Si to 5Al/95Si were prepared. Besides, various excitation wavelength from 280 to 340 nm was used in order to change the ratio intensity; I_red/I_blue, between the red emission coming from the ⁵D₀→⁷F₂ transition of Eu³⁺ ions and the blue band of silica matrix. Chemical evolution of the hydrolysis and condensation reaction of TEOS were conducted by FTIR spectroscopy. The results indicate that from 500°C a complete TEOS to SiO₂ transformation is carried out.

Luminescent Lanthanide, Luminescence, White Emission, Aluminium Oxide

Reyes, J. , Medina, D. , Aguilar, M. , Barron, M. , Garfias, E. and Morales, A. (2018) Red, White and Blue Light Emission from Europium Doped Al2O3 Confined into a Silica Matrix. Open Journal of Applied Sciences, 8, 338-345. doi: 10.4236/ojapps.2018.88025.