Nanostructure Ag dots for improving thermal stability of Ag reflector for GaN-based light-emitting diodes

Joon Woo Jeon, Woong Sun Yum, Semi Oh, Kyung Kook Kim, Tae Yeon Seong

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report the improved thermal stability of Ag reflectors for GaN-based light-emitting diodes (LEDs) using Ag nano-dots (∼65-∼190 nm in size). The nano-dot Ag samples show much higher reflectance than the Ag only samples. The annealed nano-dot Ag samples exhibit a smoother surface, where the grains contain numerous micro-twins. 〈111〉 texture becomes more dominantly evolved in the nano-dot Ag samples than in the Ag only samples after annealing. LEDs with the 300 °C-annealed nano-dot Ag reflectors exhibit 15-36 higher output power (at 20 mA) than LEDs with the 300 and 400 °C-annealed Ag only reflectors.

Original languageEnglish
Article number021115
JournalApplied Physics Letters
Volume101
Issue number2
DOIs
Publication statusPublished - 2012 Jul 9

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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