Optimizing the multiple quantum well thickness of an InGaN blue light emitting diode

Bing Xu, Jun Liang Zhao, Shu Guo Wang, Hai Tao Dai, Sheng Fu Yu, Ray Ming Lin, Fu Chuan Chu, Chou Hsiung Huang, Xiao Wei Sun

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

InGaN/GaN blue light emitting diodes with varied quantum well thickness from 2.4 nm to 3.6 nm are fabricated and characterized by atmosphere pressure metalorganic chemical vapor deposition (AP-MOCVD). Experimental results show that the exciton localization effect is enhanced from 21.76 to 23.48 by increasing the quantum well thickness from 2.4 nm to 2.7 nm. However, with the further increase of quantum well thickness, the exciton localization effect becomes weaker. Meanwhile, the peak wavelength of electroluminescence redshift with the increase of well thickness due to the larger quantum confined Stark effect (QCSE). In addition, the efficiency droop can be improved by increasing the well thickness.

Original languageEnglish
Title of host publicationLight-Emitting Diodes
Subtitle of host publicationMaterials, Devices, and Applications for Solid State Lighting XVII
DOIs
StatePublished - 2013
EventLight-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII - San Francisco, CA, United States
Duration: 04 02 201307 02 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8641
ISSN (Print)0277-786X

Conference

ConferenceLight-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII
Country/TerritoryUnited States
CitySan Francisco, CA
Period04/02/1307/02/13

Keywords

  • Efficiency droop
  • Localized state
  • MOCVD
  • QCSE

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