GaN-based light-emitting diodes with Ni-Mg solid solution/Au p-type ohmic contact

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Novel Ni-Mg solid solution (5 nm)/Au (5 nm) schemes are investigated for the development of ohmic contacts to p-type GaN. It is shown that the samples annealed at 550 °C for 1 min in air ambient produce a specific contact resistivity of 3.0 × 10-5 Ωcm2. The light transmittance of the annealed samples is about 95% at a wavelength of 470 nm. GaN-based light-emitting diodes (LEDs) made with the annealed Ni-Mg solid solution/Au p-contact layers are fabricated. The typical I-V characteristics of the green LEDs with the annealed p-type contact layers reveal a forward-bias voltage of 3.32 V at an injection current of 20 mA, which is much better than that of the LEDs with Ni/Au contact layers.

Original languageEnglish
Pages (from-to)1597-1600
Number of pages4
JournalSolid-State Electronics
Volume48
Issue number9
DOIs
Publication statusPublished - 2004 Sep 1
Externally publishedYes

Fingerprint

Ohmic contacts
Light emitting diodes
electric contacts
Solid solutions
solid solutions
light emitting diodes
Bias voltage
transmittance
injection
Wavelength
electrical resistivity
air
electric potential
Air
wavelengths

ASJC Scopus subject areas

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

Cite this

GaN-based light-emitting diodes with Ni-Mg solid solution/Au p-type ohmic contact. / Song, June O.; Leem, Dong Seok; Kim, Sang Ho; Kwak, J. S.; Nam, O. H.; Park, Y.; Seong, Tae Yeon.

In: Solid-State Electronics, Vol. 48, No. 9, 01.09.2004, p. 1597-1600.

Research output: Contribution to journalArticle

Song, June O. ; Leem, Dong Seok ; Kim, Sang Ho ; Kwak, J. S. ; Nam, O. H. ; Park, Y. ; Seong, Tae Yeon. / GaN-based light-emitting diodes with Ni-Mg solid solution/Au p-type ohmic contact. In: Solid-State Electronics. 2004 ; Vol. 48, No. 9. pp. 1597-1600.
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AU - Park, Y.

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