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Proceedings Paper

Hierarchical growth of GaN nanowires for light emitting diode applications
Author(s): Rishabh Raj; Yong-Ho Ra; Cheul-Ro Lee; Sonika Obheroi; R. Navamathavan
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Paper Abstract

Gallium nitride nanostructures have been receiving considerable attention as building blocks for nanophotonic technologies due to their unique high aspect ratios, promising the realization of photonic and biological nanodevices such as blue light emitting diodes (LEDs), short-wavelength ultraviolet nanolasers and nanofluidic biochemical sensors. In this study, we report on the hierarchical growth of GaN nanowires (NWs) by dynamically adjusting the growth parameters using pulsed flow metalorganic chemical vapor deposition (MOCVD) technique. We carried out two step growth processes to grow hierarchical GaN NWs. At the first step the GaN NWs were grown at 950°C and in the second stage, we suitably decreased the growth temperature to 710°C to grow the hierarchical structures. The surface morphology, structural and optical characterization of the grown hierarchical GaN NWs were studied by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and photoluminescence (PL) measurements, respectively. These kind of hierarchical NWs are promising to allow flat band quantum structures that are shown to improve the efficiency of light-emitting diodes.

Paper Details

Date Published: 26 February 2016
PDF: 5 pages
Proc. SPIE 9748, Gallium Nitride Materials and Devices XI, 974820 (26 February 2016); doi: 10.1117/12.2213024
Show Author Affiliations
Rishabh Raj, Vellore Institute of Technology (India)
Yong-Ho Ra, Chonbuk National Univ. (Korea, Republic of)
Cheul-Ro Lee, Chonbuk National Univ. (Korea, Republic of)
Sonika Obheroi, Vellore Institute of Technology (India)
R. Navamathavan, Vellore Institute of Technology (India)

Published in SPIE Proceedings Vol. 9748:
Gallium Nitride Materials and Devices XI
Jen-Inn Chyi; Hiroshi Fujioka; Hadis Morkoç; Yasushi Nanishi; Ulrich T. Schwarz; Jong-In Shim, Editor(s)

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