Improved AlGaInP vertical emitting light-emitting diodes using direct printing

Joong Yeon Cho, Kyeong Jae Byeon, Jin Seung Kim, Heon Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this study, we fabricated a high-brightness AlGaInP light-emitting diode (LED) using the direct printing technique and dry etching. In general, wet etching is used for surface roughening to improve the light extraction of AlGaInP red LEDs. However, a structure fabricated by wet etching has limited height and shows a tiled cone shape after the etching process due to the AlGaInP crystal structure. These limitations reduce the light extraction of the LED. As a result, we fabricated a perfectly cone-shaped pattern with high aspect ratio using direct printing by etching to maximize the LED light extraction efficiency. Compared to the red LED with a wet-etched structure, the patterning enhanced the light output power by 12% without electrical degradation. This enhanced light output power was maintained even after the packaging process.

Original languageEnglish
Pages (from-to)1573-1575
Number of pages3
JournalOptics Letters
Volume38
Issue number9
DOIs
Publication statusPublished - 2013 May 1

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Printing
printing
light emitting diodes
etching
Light
cones
output
high aspect ratio
packaging
brightness
degradation
Product Packaging
crystal structure

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Improved AlGaInP vertical emitting light-emitting diodes using direct printing. / Cho, Joong Yeon; Byeon, Kyeong Jae; Kim, Jin Seung; Lee, Heon.

In: Optics Letters, Vol. 38, No. 9, 01.05.2013, p. 1573-1575.

Research output: Contribution to journalArticle

Cho, Joong Yeon ; Byeon, Kyeong Jae ; Kim, Jin Seung ; Lee, Heon. / Improved AlGaInP vertical emitting light-emitting diodes using direct printing. In: Optics Letters. 2013 ; Vol. 38, No. 9. pp. 1573-1575.
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