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Solvothermal synthesis of Hg1-xCdxTe nanostructures-Their structural and optical properties

Khatei, Jayakrishna and Pendyala, Naresh Babu and Rao, KSRK (2011) Solvothermal synthesis of Hg1-xCdxTe nanostructures-Their structural and optical properties. In: Journal of Alloys and Compounds, 509 (13). pp. 4632-4635.

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Official URL: http://dx.doi.org/10.1016/j.jallcom.2011.01.134

Abstract

This article describes a facile, low-cost, solution-phase approach to the large-scale preparation of Hg1-xCdxTe nanostructures of different shapes such as nanorods, quantum dots, hexagonal cubes of different sizes and different compositions at a growth temperature of 180 degrees C using an air stable Te source by solvothermal technique. The XRD spectrum shows that the crystals are cubic in their basic structure and reveals the variation in lattice constant as a function of composition. The size and morphology of the products were examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The formation of irregular shaped particles and few nano-rods in the present synthesis is attributed to the cetyl trimethylammonium bromide (CTAB). The room temperature FTIR absorption and PL studies for a compositon of x = 0.8 gives a band gap of 1.1 eV and a broad emission in NIR region (0.5-0.9 eV) with all bands attributed to surface defects.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Semiconductors;Chemical synthesis;X-ray diffraction; Luminescence;Optical properties
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 19 Apr 2011 06:31
Last Modified: 19 Apr 2011 06:31
URI: http://eprints.iisc.ernet.in/id/eprint/36956

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