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

doi:10.1063/1.4737015

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

10 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 language	English
Article number	021115
Journal	Applied Physics Letters
Volume	101
Issue number	2
DOIs	https://doi.org/10.1063/1.4737015
Publication status	Published - 2012 Jul 9

Bibliographical note

Funding Information:
This work was supported by the World Class University program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology (R33-2008-000-10025-0) and the Industrial Technology Development Program funded by the Ministry of Knowledge Economy (MKE), Korea.

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Cite this

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title = "Nanostructure Ag dots for improving thermal stability of Ag reflector for GaN-based light-emitting diodes",

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.",

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note = "Funding Information: This work was supported by the World Class University program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology (R33-2008-000-10025-0) and the Industrial Technology Development Program funded by the Ministry of Knowledge Economy (MKE), Korea.",

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AU - Kim, Kyung Kook

AU - Seong, Tae Yeon

N1 - Funding Information: This work was supported by the World Class University program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology (R33-2008-000-10025-0) and the Industrial Technology Development Program funded by the Ministry of Knowledge Economy (MKE), Korea.

PY - 2012/7/9

Y1 - 2012/7/9

N2 - 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.

AB - 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.

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

Abstract

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