Molecular beam epitaxial growth and characterization of InGaN/GaN dot-in-a-wire nanoscale heterostructures: Toward ultrahigh efficiency phosphor-free white light emitting diodes

Zetian Mi, Hieu Pham Trung Nguyen, Shaofei Zhang, Kai Cui, Mehrdad Djavid

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

One of the grand challenges for future solid state lighting is the development of high efficiency, phosphor-free white light emitting diodes (LEDs). In this context, we have investigated the molecular beam epitaxial growth and characterization of nanowire LEDs on Si, wherein intrinsic white-light emission is achieved by incorporating selforganized InGaN quantum dots in defect-free GaN nanowires on a single chip. We have further demonstrated that, with the incorporation of p-type modulation doping and AlGaN electron blocking layer, InGaN/GaN dot-in-a-wire white LEDs can exhibit nearly zero efficiency droop and significantly enhanced internal quantum efficiency (up to ∼57%) at room-temperature.

Original languageEnglish (US)
Title of host publicationQuantum Dots and Nanostructures
Subtitle of host publicationSynthesis, Characterization, and Modeling X
DOIs
StatePublished - Jun 3 2013
Externally publishedYes
EventQuantum Dots and Nanostructures: Synthesis, Characterization, and Modeling X - San Francisco, CA, United States
Duration: Feb 4 2013Feb 6 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8634
ISSN (Print)0277-786X

Other

OtherQuantum Dots and Nanostructures: Synthesis, Characterization, and Modeling X
Country/TerritoryUnited States
CitySan Francisco, CA
Period2/4/132/6/13

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • And gallium nitride
  • Light emitting diodes
  • Molecular beam epitaxy
  • Nanowire

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