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Investigation of the efficiency-droop mechanism in a GaN based blue light-emitting diodes using a very-fast electrical-optical pump-probe technique

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5 Author(s)
J. -W. Shi ; Dept. of Electrical Engineering, National Central University, Taoyuan 320, Taiwan ; Che-Wei Lin ; Wei Chen ; M. L. Lee
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Electrical-optical pump-probe is used to investigate GaN blue LEDs under different temperatures. Measurement result indicates that under moderate current density (~200A/cm2) piezoelectric field induced carrier-escaping cannot be neglected and is responsible for the observed efficiency-droop.

Published in:

IEEE Photonic Society 24th Annual Meeting

Date of Conference:

9-13 Oct. 2011