Open AccessTunable color temperature of Ce^3+/Eu^2+, 3+ co-doped low silica aluminosilicate glasses for white lighting
Author(s) -
A. C. P. Rocha,
L.H.C. Andrade,
S. M. Lima,
Aline M. Farias,
A. C. Bento,
Mauro Luciano Baesso,
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.20.010034
Subject(s) - phosphor , materials science , color temperature , doping , optics , aluminosilicate , chromaticity , emission spectrum , optoelectronics , spectroscopy , europium , calcium aluminosilicate , luminescence , sodium aluminosilicate , excited state , light emitting diode , spectral line , chemistry , physics , biochemistry , quantum mechanics , astronomy , catalysis , nuclear physics
In this paper we report results of tunable lighting in Ce(3+)/Eu(2+,3+) doped low silica calcium aluminosilicate glass. Optical spectroscopy experiments indicate that there is a red color compensation from Eu(2+) and Eu(3+) to the green emission from Ce(3+), resulting in a broad and tunable emission spectra depending on the excitation wavelength. This result analysed in the CIE 1976 color diagram shows a close distance from the Plank emission and a correlated color temperature, varying from 5200 to 3500K. This indicates that our system can be easily excited by GaN based blue LEDs, being an interesting phosphor for white lighting devices.