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Title: Analysis of low efficiency droop of semipolar InGaN quantum well light-emitting diodes by modified rate equation with weak phase-space filling effect

Abstract

We study the low efficiency droop characteristics of semipolar InGaN light-emitting diodes (LEDs) using modified rate equation incoporating the phase-space filling (PSF) effect where the results on c-plane LEDs are also obtained and compared. Internal quantum efficiency (IQE) of LEDs was simulated using a modified ABC model with different PSF filling (n{sub 0}), Shockley-Read-Hall (A), radiative (B), Auger (C) coefficients and different active layer thickness (d), where the PSF effect showed a strong impact on the simulated LED efficiency results. A weaker PSF effect was found for low-droop semipolar LEDs possibly due to small quantum confined Stark effect, short carrier lifetime, and small average carrier density. A very good agreement between experimental data and the theoretical modeling was obtained for low-droop semipolar LEDs with weak PSF effect. These results suggest the low droop performance may be explained by different mechanisms for semipolar LEDs.

Authors:
; ;  [1]
  1. School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287 (United States)
Publication Date:
OSTI Identifier:
22611522
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARRIER DENSITY; CARRIER LIFETIME; CARRIERS; COMPARATIVE EVALUATIONS; GALLIUM COMPOUNDS; INDIUM COMPOUNDS; LAYERS; LIGHT EMITTING DIODES; NITROGEN COMPOUNDS; PHASE SPACE; QUANTUM EFFICIENCY; QUANTUM WELLS; REACTION KINETICS; SIMULATION; STARK EFFECT; THICKNESS; VISIBLE RADIATION

Citation Formats

Fu, Houqiang, Lu, Zhijian, and Zhao, Yuji. Analysis of low efficiency droop of semipolar InGaN quantum well light-emitting diodes by modified rate equation with weak phase-space filling effect. United States: N. p., 2016. Web. doi:10.1063/1.4954296.
Fu, Houqiang, Lu, Zhijian, & Zhao, Yuji. Analysis of low efficiency droop of semipolar InGaN quantum well light-emitting diodes by modified rate equation with weak phase-space filling effect. United States. doi:10.1063/1.4954296.
Fu, Houqiang, Lu, Zhijian, and Zhao, Yuji. Wed . "Analysis of low efficiency droop of semipolar InGaN quantum well light-emitting diodes by modified rate equation with weak phase-space filling effect". United States. doi:10.1063/1.4954296.
@article{osti_22611522,
title = {Analysis of low efficiency droop of semipolar InGaN quantum well light-emitting diodes by modified rate equation with weak phase-space filling effect},
author = {Fu, Houqiang and Lu, Zhijian and Zhao, Yuji},
abstractNote = {We study the low efficiency droop characteristics of semipolar InGaN light-emitting diodes (LEDs) using modified rate equation incoporating the phase-space filling (PSF) effect where the results on c-plane LEDs are also obtained and compared. Internal quantum efficiency (IQE) of LEDs was simulated using a modified ABC model with different PSF filling (n{sub 0}), Shockley-Read-Hall (A), radiative (B), Auger (C) coefficients and different active layer thickness (d), where the PSF effect showed a strong impact on the simulated LED efficiency results. A weaker PSF effect was found for low-droop semipolar LEDs possibly due to small quantum confined Stark effect, short carrier lifetime, and small average carrier density. A very good agreement between experimental data and the theoretical modeling was obtained for low-droop semipolar LEDs with weak PSF effect. These results suggest the low droop performance may be explained by different mechanisms for semipolar LEDs.},
doi = {10.1063/1.4954296},
journal = {AIP Advances},
number = 6,
volume = 6,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}