Characterization and endurance study of aluminate/silicate/garnet/nitride phosphors for high-performance SSL

Nicola Trivellin; Matteo Meneghini; Matteo Dal Lago; Diego Barbisan; Marco Ferretti; Gaudenzio Meneghesso; Enrico Zanoni

doi:10.1117/12.2005291

4 March 2013 Characterization and endurance study of aluminate/silicate/garnet/nitride phosphors for high-performance SSL

Nicola Trivellin, Matteo Meneghini, Matteo Dal Lago, Diego Barbisan, Marco Ferretti, Gaudenzio Meneghesso, Enrico Zanoni

Author Affiliations +

Proceedings Volume 8641, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII; 86411H (2013) https://doi.org/10.1117/12.2005291
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

With this work we report on the performance and degradation mechanism of commercially available remote phosphors (RP) for SSL. Thermal analysis indicates that phosphors can reach temperatures above 60°C during operation at an ambient temperature of 25°C when subjected to an optical power of 346 mW/cm2. We also demonstrate that temperature is a strong driving force for the degradation. Results indicate a gradual reduction in luminous flux output and a decrease of correlated color temperature as a consequence of stress. We demonstrate that the degradation rate is strongly correlated with stress temperature with an activation energy of 1.36 eV for a TTF of 70%.

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Nicola Trivellin, Matteo Meneghini, Matteo Dal Lago, Diego Barbisan, Marco Ferretti, Gaudenzio Meneghesso, and Enrico Zanoni "Characterization and endurance study of aluminate/silicate/garnet/nitride phosphors for high-performance SSL", Proc. SPIE 8641, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII, 86411H (4 March 2013); https://doi.org/10.1117/12.2005291

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