Numerical simulations of light-extraction efficiencies of light-emitting diodes on micro and nanopatterned sapphire substrates

Title
Numerical simulations of light-extraction efficiencies of light-emitting diodes on micro and nanopatterned sapphire substrates
Author(s)
박시현최호
Keywords
PATTERNED SAPPHIRE; GAN; LEDS; POWER; IMPROVEMENT; TEXTURE; DESIGN
Issue Date
201412
Publisher
INST ENGINEERING TECHNOLOGY-IET
Citation
MICRO & NANO LETTERS, v.9, no.12, pp.841 - 844
Abstract
Numerical simulations are performed to investigate the light-extraction efficiencies (LEEs) of gallium nitride-based light-emitting diodes (LEDs) on patterned sapphire substrates (PSSs), using the three-dimensional finite-difference time-domain method. PSSs with hexagonal arrays of cone-shaped patterns were used, and the pitch of the pattern array, pattern fill factor and pattern height were varied from nanoscale to microscale. The relative LEE for each PSS-LED was calculated, and the geometrical parameters were analysed for optimised light extraction enhancement of the PSS-LEDs.
URI
http://hdl.handle.net/YU.REPOSITORY/30346http://dx.doi.org/10.1049/mnl.2014.0373
ISSN
1750-0443
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공과대학 > 전자공학과 > Articles
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