TITLE

The aspect ratio effects on the performances of GaN-based light-emitting diodes with nanopatterned sapphire substrates

AUTHOR(S)
Chien-Chih Kao; Yan-Kuin Su; Chuing-Liang Lin; Jian-Jhong Chen
PUB. DATE
July 2010
SOURCE
Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p023111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The nanopatterned sapphire substrates (NPSSs) with aspect ratio that varied from 2.00 to 2.50 were fabricated by nanoimprint lithography. We could improve the epitaxial film quality and enhance the light extraction efficiency by NPSS technique. In this work, the aspect ratio effects on the performances of GaN-based light-emitting diodes (LEDs) with NPSS were investigated. The light output enhancement of GaN-based LEDs with NPSS was increased from 11% to 27% as the aspect ratio of the NPSS increases from 2.00 to 2.50. Owing to the same improvement of crystalline quality by using various aspect ratios of NPSS, these results indicated that the aspect ratio of the NPSS is strongly related to the light extraction efficiency.
ACCESSION #
52289390

 

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