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Indium Nitride Nanometric-Objects on c-Sapphire Grown by Plasma-Assisted Molecular Beam Epitaxy

Roul, Basanta and Kumar, Mahesh and Rajpalke, Mohana K and Bhat, Thirumaleshwara N and Sinha, Neeraj and Kalghatgi, AT and Krupanidhi, SB (2010) Indium Nitride Nanometric-Objects on c-Sapphire Grown by Plasma-Assisted Molecular Beam Epitaxy. In: Nanoscience and Nanotechnology Letters, 2 (3). pp. 257-260.

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Official URL: http://www.ingentaconnect.com/content/asp/nnl/2010...

Abstract

The indium nitride (InN)-based nanometric-objects were grown directly on a c-sapphire substrate by using plasma-assisted molecular beam epitaxy (PAMBE) at different substrate temperatures. High resolution X-ray diffraction (HRXRD) reveals the InN (0002) reflection and full width at half maximum (FWHM) found to be decreased with increasing the growth temperature. The size, height and density of the grown nanometric-objects studied by scanning electron microscopy (SEM) has remarkable differences, evidencing the decisive role of substrate temperature. Photoluminescence (PL) studies revealed that the emission energy is shifted towards the higher side from the bulk value, i.e., a blue shift in the PL spectra was observed. The temperature dependence of the PL peak position shows an ``S-shaped'' emission energy shift, which can be attributed to the localization of carriers in the nanometric-objects.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Scientific Publishers.
Keywords: Indium Nitride;Nanometric-Objects;Photoluminescence;PAMBE
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 30 Aug 2011 06:52
Last Modified: 30 Aug 2011 06:52
URI: http://eprints.iisc.ernet.in/id/eprint/39968

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