Open AccessBroad combined orange-red emissions from Eu^2+- and Eu^3+-doped low-silica calcium aluminosilicate glass
Author(s) -
S. M. Lima,
Luís Humberto da Cunha Andrade,
J.R. Silva,
A. C. Bento,
Mauro Luciano Baesso,
J.A. Sampaio,
Luiz Antônio de Oliveira Nunes,
Y. Guyot,
G. Boulon
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.012658
Subject(s) - phosphor , doping , chromaticity , materials science , aluminosilicate , emission spectrum , luminescence , wavelength , calcium aluminosilicate , optics , ion , orange (colour) , analytical chemistry (journal) , color temperature , excitation , europium , mineralogy , spectral line , optoelectronics , chemistry , physics , biochemistry , organic chemistry , chromatography , quantum mechanics , astronomy , catalysis
In this paper, a broad combined orange-red emission from Eu²⁺- and Eu³⁺-doped low-silica calcium aluminosilicate (LSCAS) glass is reported. Spectroscopic results demonstrate that it is possible to tune the emission wavelength by changing the excitation wavelength in the UV-Vis region. The color coordinates for the emission spectra were calculated, and using the Commission Internationale de l'Éclairage 1931 and 1976 chromatic diagrams, it is possible to note that they are dependent on the excitation wavelength. In addition, the (u', v') color coordinates for the investigated LSCAS samples are close to the Planckian spectrum in the cold region between 2000 and 2600K. Our results show that the Eu:LSCAS system can be used in a white light phosphor when mixed in aggregate with phosphors using green-yellow luminescent ions.