Optimizing performance and energy consumption in GaN(n)/InxGa1-xN/GaN/AlGaN/GaN(p) light-emitting diodes by quantum-well number and mole fraction

N. N. Selmane*, A. A. Cheknane, F. F. Khemloul, H. S. Hilal, M. H.S. Helal, N. N. Baydogan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

High performance and safe light-emitting devices (LEDs) are needed. Highly efficient IIIV nitride semiconductors are known for short-wavelength LEDs. Multiple-quantum well (MQW) are considered in LEDs. Influence of MQW and indium concentration on LED performance are studied here in GaN(n)/InxGa1-xN(i)/GaN(i)/AlGaN(p)/GaN(p) LEDs, where GaN(n) and GaN(p) have different dopants to formulate junctions, InxGa1-xN(i) is a 3 nm-thick intrinsic QW, GaN(i) is barrier intrinsic layer and AlGaN(p) is a 15 nm-thick electron blocking layer (EBL). Simulation is performed by Tcad-Silvaco. Current versus voltage (I-V) plots, luminosity power, band diagram, spectrum response, radiative recombination rate and electric field effect, are investigated to rationalize effects of InxGa1-xN(i) QW number and x. Increasing (x) improves radiative recombination rate, spectral power and band gap at less current. Devices with 6 quantum wells and x= 0.16 or 0.18 exhibit best performance. Minimizing x at 0.16, at high performance, is described.

Original languageEnglish
Pages (from-to)1557-1576
Number of pages20
JournalDigest Journal of Nanomaterials and Biostructures
Volume18
Issue number4
DOIs
Publication statusPublished - 1 Dec 2023

Bibliographical note

Publisher Copyright:
© 2023 Digest Journal of Nanomaterials and Biostructures. All rights reserved.

Keywords

  • Energy saving
  • InGaN/GaN
  • Multiple quantum-well light emitting diodes (MQW LED)
  • Radiative recombination
  • Spontaneous emission

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