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Titolo: Phosphors for LED-based light sources: Thermal properties and reliability issues
Autori: 
Data di pubblicazione: 2012
Rivista: 
MICROELECTRONICS RELIABILITY  
Citazione: Phosphors for LED-based light sources: Thermal properties and reliability issues / Dal Lago M; Meneghini M; Trivellin N; Mura G; Vanzi M; Meneghesso G; Zanoni E. - 52:9-10(2012), pp. 2164-2167.
Abstract: The aim of this work is to investigate the thermal stability of remote phosphor plates to be used in solid-state lighting systems, for the conversion of the blue light emitted by GaN-based LEDs into white light. A preliminary thermal characterization revealed that in normal conditions of blue light irradiance the phosphor plates can reach temperature levels higher than 60 °C, which can affect both performance and reliability. The results of accelerated thermal stress tests indicate that high temperature levels can trigger a relevant degradation mechanism (estimated activation energy is 1.2 eV), that drastically reduces the phosphor conversion efficiency and modifies the photometric and colorimetric characteristics of the emitted white light.
Handle: http://hdl.handle.net/11584/102490
Tipologia:1.1 Articolo in rivista

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