Low resistance and reflective Mg-doped indium oxide-Ag ohmic contacts for flip-chip light-emitting diodes

June O. Song, Dong Seok Leem, J. S. Kwak, O. H. Nam, Y. Park, Tae Yeon Seong

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

We have investigated an Mg-doped InxOy (MIO)-Ag scheme for the formation of high-quality ohmic contacts to p-type GaN for flip-chip light-emitting diodes (LEDs). The as-deposited sample shows nonlinear current-voltage (I-V) characteristics. However, annealing the contacts at temperatures of 330°C-530°C for 1 min in air ambient results in linear I-V behaviors, producing specific contact resistances of 10-4-10-5 Ω · cm2. In addition, blue LEDs fabricated with the MIO-Ag contact layers give forward-bias voltages of 3.13-3.15 V at an injection current of 20 mA. It is further shown that LEDs made with the MIO-Ag contact layers give higher output power compared with that with the Ag contact layer. This result strongly indicates that the MIO-Ag can be a promising scheme for the realization of high brightness LEDs for solid-state lighting application.

Original languageEnglish
Pages (from-to)1450-1452
Number of pages3
JournalIEEE Photonics Technology Letters
Volume16
Issue number6
DOIs
Publication statusPublished - 2004 Jun 1
Externally publishedYes

Fingerprint

Ohmic contacts
low resistance
indium oxides
Indium
Light emitting diodes
electric contacts
light emitting diodes
chips
Oxides
electric potential
Contact resistance
Bias voltage
contact resistance
illuminating
Luminance
brightness
Lighting
Annealing
injection
solid state

Keywords

  • Flip-chip light-emitting diode (LED)
  • GaN
  • Indium oxide
  • Ohmic contacts

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)
  • Atomic and Molecular Physics, and Optics

Cite this

Low resistance and reflective Mg-doped indium oxide-Ag ohmic contacts for flip-chip light-emitting diodes. / Song, June O.; Leem, Dong Seok; Kwak, J. S.; Nam, O. H.; Park, Y.; Seong, Tae Yeon.

In: IEEE Photonics Technology Letters, Vol. 16, No. 6, 01.06.2004, p. 1450-1452.

Research output: Contribution to journalArticle

Song, June O. ; Leem, Dong Seok ; Kwak, J. S. ; Nam, O. H. ; Park, Y. ; Seong, Tae Yeon. / Low resistance and reflective Mg-doped indium oxide-Ag ohmic contacts for flip-chip light-emitting diodes. In: IEEE Photonics Technology Letters. 2004 ; Vol. 16, No. 6. pp. 1450-1452.
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AU - Park, Y.

AU - Seong, Tae Yeon

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