Impact of Die Carrier on Reliability of Power LEDs
Maslovski , S.
Mendes, J. C.
IEEE Journal of the Electron Devices Society Vol. 9, Nº 9, pp. 854 - 863, September, 2021.
ISSN (print): 2168-6734
Scimago Journal Ranking: 0,57 (in 2021)
Digital Object Identifier: 10.1109/JEDS.2021.3115027
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High power light emitting diodes (LEDs) suffer from heating effects that have a detrimental
impact on the devices characteristics. The use of LED carriers with high thermal conductivity promotes
extraction of heat away from the LED junction. Different materials can be used for this purpose, such
as alumina, aluminium nitride, and silicon. Diamond has also been gaining momentum for demanding
heat management applications. In order to evaluate the impact of the carrier material on the reliability of
the devices, the junction temperature of Cree white XLamp XB-D LEDs was obtained with Ansys for
various carriers and different LED current levels. The impact of the junction temperature on the LED’s
lifetime, emission intensity, footprint, and wavelength stability was then evaluated for each carrier based
on the datasheet of the devices. The results provide additional knowledge regarding the impact of the
carrier on the performance of the LED.