Hybrid indium tin oxide/Ag nanowire electrodes for improving the light output power of near ultraviolet AlGaN-based light-emitting diode

Jae Seong Park, Jae Ho Kim, Jun Yong Kim, Dae Hyun Kim, Daesung Kang, Jun Suk Sung, Tae Yeon Seong

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Ag nanowires (Ag NWs) were combined with a thin indium tin oxide (ITO) film as the p-type electrode in near ultraviolet (NUV) AlGaN-based light-emitting diodes (LEDs) to improve the light output power. The Ag NWs (30 ± 5 nm in diameter and 25 ± 5 μm long) were dispersed in ethanol (0.3 wt%). The transmittances of 10 nm-thick ITO, ITO/Ag NWs coated at 1000 rpm, and ITO/Ag NWs coated at 3000 rpm were 98%, 90%, and 97% at 385 nm, respectively. LEDs (chip size: 300 × 800 μm2) fabricated with the ITO/Ag NW electrode exhibited higher forward-bias voltages than the LEDs with the ITO-only electrode. However, LEDs with ITO/Ag NWs films coated at 1000 and 3000 rpm yielded 7.9 and 14.0% higher light output power, respectively, at 100 mA than the LED with ITO-only electrode. The improved output power with the ITO/Ag NWs films is attributed to an optimal trade-off between optical transmittance and current spreading.

Original languageEnglish
Pages (from-to)545-548
Number of pages4
JournalCurrent Applied Physics
Volume16
Issue number5
DOIs
Publication statusPublished - 2016 May 1

Keywords

  • Current spreading
  • Near ultraviolet light-emitting diodes
  • Silver nanowires

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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