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Efficiency droop in nitride-based light-emitting diodes

✍ Scribed by Piprek, Joachim

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
672 KB
Volume
207
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Nitride‐based light‐emitting diodes (LEDs) suffer from a reduction (droop) of the internal quantum efficiency with increasing injection current. This droop phenomenon is currently the subject of intense research worldwide, as it delays general lighting applications of GaN‐based LEDs. Several explanations of the efficiency droop have been proposed in recent years, but none is widely accepted. This feature article provides a snapshot of the present state of droop research, reviews currently discussed droop mechanisms, contextualizes them, and proposes a simple yet unified model for the LED efficiency droop.magnified image

Illustration of LED efficiency droop (details in Fig. 13).

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