High transparency of AgZn-Ni solid-solution ohmic contacts for GaN-based ultraviolet light-emitting diodes

Dong Seok Leem, June O. Song, Woong K. Hong, Jeong T. Maeng, J. S. Kwak, Y. Park, Tae Yeon Seong

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

AgZn-Ni solid-solution scheme has been investigated to produce transparent ohmic contacts for ultraviolet (UV) light-emitting diodes (LEDs). The AgZn-Ni solid-solution contacts annealed at 430 °C for 1 min in air show high transmittance of 67%-69% at 340 nm, which is much better than that (53%) of the conventional NiAu contact. The annealed contacts give specific contact resistance of 8.2× 10-5 and 4.8× 10-5 Ω cm2. Further, near UV LEDs (300×300 μ m2) made with the annealed contact layers produce a forward-bias voltage of 3.32-3.46 V at 20 mA. Possible explanations are given to describe the annealing-induced improvement of the ohmic behaviors of the AgZn-Ni solid-solution contacts.

Original languageEnglish
Article number102102
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number10
DOIs
Publication statusPublished - 2005 Mar 7
Externally publishedYes

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ultraviolet radiation
electric contacts
solid solutions
light emitting diodes
contact resistance
transmittance
annealing
air
electric potential

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

High transparency of AgZn-Ni solid-solution ohmic contacts for GaN-based ultraviolet light-emitting diodes. / Leem, Dong Seok; Song, June O.; Hong, Woong K.; Maeng, Jeong T.; Kwak, J. S.; Park, Y.; Seong, Tae Yeon.

In: Applied Physics Letters, Vol. 86, No. 10, 102102, 07.03.2005, p. 1-3.

Research output: Contribution to journalArticle

Leem, Dong Seok ; Song, June O. ; Hong, Woong K. ; Maeng, Jeong T. ; Kwak, J. S. ; Park, Y. ; Seong, Tae Yeon. / High transparency of AgZn-Ni solid-solution ohmic contacts for GaN-based ultraviolet light-emitting diodes. In: Applied Physics Letters. 2005 ; Vol. 86, No. 10. pp. 1-3.
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AU - Kwak, J. S.

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AU - Seong, Tae Yeon

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