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Issue 23, 2018
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The effect of nitridation on the polarity and optical properties of GaN self-assembled nanorods

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Abstract

We report on the effect of nitridation on GaN self-assembled nanorods grown on the c-plane sapphire by metalorganic chemical vapour deposition (MOCVD). Nitridation conditions are found to critically influence the nanorod morphology and optical properties. The nanorod polarity was determined through a direct observation of atomic dumbbell pairs. While purely N-polar wires are obtained under optimised nitridation, incomplete or missing nitridation leads to mixed polarity. By comparing the morphology and the crystal structure with spatially resolved cathodoluminescence results, our study unambiguously establishes a link between appropriate nitridation duration and a homogeneous improvement in optical quality.

Graphical abstract: The effect of nitridation on the polarity and optical properties of GaN self-assembled nanorods

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Publication details

The article was received on 26 Jan 2018, accepted on 14 May 2018 and first published on 15 May 2018


Article type: Paper
DOI: 10.1039/C8NR00737C
Citation: Nanoscale, 2018,10, 11205-11210
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    The effect of nitridation on the polarity and optical properties of GaN self-assembled nanorods

    B. Zhao, M. N. Lockrey, P. Caroff, N. Wang, L. Li, J. Wong-Leung, H. H. Tan and C. Jagadish, Nanoscale, 2018, 10, 11205
    DOI: 10.1039/C8NR00737C

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