4 March 2013 Color tunable green-yellow-orange-red erbium/europium codoped fluorolead germanate glass phosphor for application in LED illumination technology
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Abstract
Color tunable wide gamut light covering the greenish, yellow-green, yellow, orange, and reddish tone chromaticity region in europium/erbium co-doped lead-cadmium-germanate PbGeO3:PbF2:CdF2 glass phosphor is presented. The phosphors were synthesized, and their light emission properties examined under UV/blue light-emitting-diode excitation. Luminescence emission around 525, 550, 590, 610, and 660 nm was obtained and analyzed as a function of Eu/Er concentration, excitation wavelength, and glass host composition. The color tunability was actually obtained via proper combination of Er3+ and Eu3+ active ions concentration. The combination of the emission tone with a blue LED in the region of 400-460 nm, yields a mixture of light with color in the white-light region presenting a CCT in the range of 2000 to 4000 K. Results indicate that the color-tunable fluorolead germanate erbium/europium co-doped glass phosphor herein reported is a promising novel contender for application in LED-based solid-state illumination technology
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Artur S. Gouveia-Neto, Artur S. Gouveia-Neto, Wellington S. Souza, Wellington S. Souza, Renata O. Domingues, Renata O. Domingues, Ernande B. da Costa, Ernande B. da Costa, Luciano A. Bueno, Luciano A. Bueno, } "Color tunable green-yellow-orange-red erbium/europium codoped fluorolead germanate glass phosphor for application in LED illumination technology", Proc. SPIE 8641, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII, 86411E (4 March 2013); doi: 10.1117/12.2001118; https://doi.org/10.1117/12.2001118
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