✦ LIBER ✦

Temperature-dependent light-output characteristics of GaInN light-emitting diodes with different dislocation densities

✍ Scribed by Chhajed, Sameer ;Cho, Jaehee ;Schubert, E. Fred ;Kim, Jong Kyu ;Koleske, Daniel D. ;Crawford, Mary H.

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 311 KB
Volume: 208
Category: Article
ISSN: 0031-8965
DOI: 10.1002/pssa.201026668

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✦ Synopsis

Abstract

We have experimentally investigated the temperature dependence of optical‐output power of light‐emitting diodes (LEDs) with different threading dislocation densities (TDDs) to assess the influence of the TDD on the temperature stability of LEDs. Whereas the LED with high TDD shows a 64% decrease in optical‐output power when the ambient temperature increases from 20 to 150 °C, the LED with low TDD shows only a 54% decrease. The temperature dependence of the optical‐output power and current dependence of the characteristic temperature T~ch~ of LEDs shows that short radiative recombination lifetime and low TDDs are essential to obtain LED characteristics that are tolerant of high temperatures.

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