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Efficiency droop in nitride‐based light‐emitting diodes
Author(s) -
Piprek Joachim
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201026149
Subject(s) - voltage droop , light emitting diode , diode , computer science , nitride , materials science , optoelectronics , electrical engineering , engineering , voltage , nanotechnology , layer (electronics) , voltage divider
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.Illustration of LED efficiency droop (details in Fig. 13).