Contact formation and patterning approaches for group-III nitride light emitters

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Authors
Hou, Wenting
Issue Date
2013-05
Type
Electronic thesis
Thesis
Language
ENG
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Physics
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Abstract
Efficiency of LEDs can be greatly improved by means of nano-patterning processes. LEDs grown on nano-imprint patterned sapphire substrates showed promising performance, with improvement in both internal quantum efficiency and light extraction efficiency. As an alternative to nano-imprint lithography, this study utilized a simple method to generate irregular nano-patterns by a Ni self-assembly process and applied the process to both sapphire substrate and n-GaN template. In both approaches, the nano-patterned LEDs showed an improvement in light output power.
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May 2013
School of Science
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Rensselaer Polytechnic Institute, Troy, NY
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