Degradation mechanisms of high-power white LEDs activated by current and temperature

Abstract

This paper presents a study of the degradation mechanisms that limit the reliability of commerciallyavailable white LEDs. Purely thermal stress and biased iso-thermal stress were carried out for several thousands hours on 1W-power LEDs, produced by a leading manufacturer. Results reveal that temperature and operating current have different roles in… (More)
DOI: 10.1016/j.microrel.2011.06.057

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12 Figures and Tables