Color tunable green-yellow-orange-red erbium/europium codoped fluorolead germanate glass phosphor for application in LED illumination technology

Artur S. Gouveia-Neto; Wellington S. Souza; Renata O. Domingues; Ernande B. da Costa; Luciano A. Bueno

doi:10.1117/12.2001118

4 March 2013 Color tunable green-yellow-orange-red erbium/europium codoped fluorolead germanate glass phosphor for application in LED illumination technology

Artur S. Gouveia-Neto, Wellington S. Souza, Renata O. Domingues, Ernande B. da Costa, Luciano A. Bueno

Author Affiliations +

Proceedings Volume 8641, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII; 86411E (2013) https://doi.org/10.1117/12.2001118
Event: SPIE OPTO, 2013, San Francisco, California, United States

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

Citation Download Citation

Artur S. Gouveia-Neto, Wellington S. Souza, Renata O. Domingues, Ernande B. da Costa, and 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); https://doi.org/10.1117/12.2001118

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