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Proceedings Paper

Characterization and endurance study of aluminate/silicate/garnet/nitride phosphors for high-performance SSL
Author(s): Nicola Trivellin; Matteo Meneghini; Matteo Dal Lago; Diego Barbisan; Marco Ferretti; Gaudenzio Meneghesso; Enrico Zanoni
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Paper 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%.

Paper Details

Date Published: 4 March 2013
PDF: 11 pages
Proc. SPIE 8641, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII, 86411H (4 March 2013); doi: 10.1117/12.2005291
Show Author Affiliations
Nicola Trivellin, LightCube SRL (Italy)
Univ. degli Studi di Padova (Italy)
Matteo Meneghini, Univ. degli Studi di Padova (Italy)
Matteo Dal Lago, Univ. degli Studi di Padova (Italy)
Diego Barbisan, Univ. degli Studi di Padova (Italy)
Marco Ferretti, Univ. degli Studi di Padova (Italy)
Gaudenzio Meneghesso, Univ. degli Studi di Padova (Italy)
Enrico Zanoni, Univ. degli Studi di Padova (Italy)


Published in SPIE Proceedings Vol. 8641:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Martin Strassburg, Editor(s)

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