Using agglomerated Ag grid to improve the light output of near ultraviolet AlGaN-based light-emitting diode

Jun Yong Kim, Jae Seong Park, Jin Young Na, Sun Kyung Kim, Daesung Kang, Tae Yeon Seong

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this study, we introduced mesh-patterned Ag grid (width: 15–20 μm) to enhance the light output power of near ultraviolet (385 nm) AlGaN-based light emitting diode (LEDs). The Ag grid was intentionally agglomerated by annealing at 500 °C for 1 min in air. The output performance of AlGaN-based LEDs fabricated with Ag-grid/indium tin oxide (ITO) electrodes was compared with those with ITO electrode. At a wavelength of 385 nm, the samples had transmittances of 54.2–74.1%. LEDs with the Ag-grid/ITO contacts exhibited lower forward voltages of 3.32–3.57 V at 20 mA than LED with the ITO electrode (3.64 V). The LEDs with the Ag-grid/ITO electrodes exhibited 15.6–15.9% higher light output (at 400 mW) than that with the ITO electrode. Based on finite-difference time-domain simulations, the improved output performance is briefly described and discussed.

Original languageEnglish
Pages (from-to)29-33
Number of pages5
JournalMicroelectronic Engineering
Volume169
DOIs
Publication statusPublished - 2017 Feb 5

Keywords

  • Ag-grid
  • Agglomeration
  • Current spreading
  • Light emitting diode

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

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