Enhancement of light extraction in GaN based LED structures using TiO2 nano-structures

Kyung Min Yoon, Ki Yeon Yang, Kyeong Jae Byeon, Heon Lee

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

TiO2 nano-patterns were formed on the indium-tin-oxide (ITO) layer of GaN based light emitting diodes (LEDs) without a residual layer using a sol-imprinting process. A polydimethylsiloxane mold replicated from a Si master was used as the imprint stamp for the sol-imprinting process. The light extraction efficiency of LEDs was enhanced by the TiO2 nano-patterns formed on the ITO layer because the TiO2 nano-patterns locally modulated the refractive index of the ITO layer and enhanced the scattering of light at the ITO layer. Consequently, directly fabricated TiO2 nano-patterns on the ITO layer can esoln hance the light extraction efficiency of LEDs without plasma-induced damage.

Original languageEnglish
Pages (from-to)484-487
Number of pages4
JournalSolid-State Electronics
Volume54
Issue number4
DOIs
Publication statusPublished - 2010 Apr 1

Fingerprint

Tin oxides
Indium
Light emitting diodes
light emitting diodes
indium oxides
tin oxides
augmentation
Polymethyl Methacrylate
Sols
Polydimethylsiloxane
Refractive index
titanium dioxide
indium tin oxide
Scattering
Plasmas
refractivity
damage
scattering

Keywords

  • Light emitting diode (LED)
  • Nano-pattern
  • Photoluminescence
  • Photon extraction efficiency
  • Sol-imprint
  • TiO

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Enhancement of light extraction in GaN based LED structures using TiO2 nano-structures. / Yoon, Kyung Min; Yang, Ki Yeon; Byeon, Kyeong Jae; Lee, Heon.

In: Solid-State Electronics, Vol. 54, No. 4, 01.04.2010, p. 484-487.

Research output: Contribution to journalArticle

Yoon, Kyung Min ; Yang, Ki Yeon ; Byeon, Kyeong Jae ; Lee, Heon. / Enhancement of light extraction in GaN based LED structures using TiO2 nano-structures. In: Solid-State Electronics. 2010 ; Vol. 54, No. 4. pp. 484-487.
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