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Effect of nitridation on the polarity and optical properties of GaN self-assembled nanorods

Abstract

We report on the effect of nitridation on GaN self-assembled nanorods grown on c-plane sapphire by metalorganic chemical vapour deposition (MOCVD). Nitridation conditions are found to be critically influencing the nanorod morphology and optical properties. The nanorod polarity was determined through 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, crystal structure with spatially resolved cathodoluminescence results, our study unambiguously establishes the link between appropriate nitridation duration and a homogeneous improvement in optical quality.

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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, Accepted Manuscript
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    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, Accepted Manuscript , DOI: 10.1039/C8NR00737C

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