Enhanced electroluminescence properties of doped ZnS nanorods formed by the self-assembly of colloidal nanocrystals

Manzoor, K and Aditya, V and Vadera, SR and Kumar, N and Kutty, TRN (2005) Enhanced electroluminescence properties of doped ZnS nanorods formed by the self-assembly of colloidal nanocrystals. In: Solid State Communications, 135 (1-2). pp. 16-20.

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Abstract

Aggregation based meso-scale self-assembly of doped semiconductor nanocrystals leading to the formation of monocrystalline nanorodsshowing enhanced photo- and electro-luminescence properties isreported. similar to 4 nm sized, polycrystalline ZnS nanoparticles ofzinc-blende (cubic) structure, doped with Cu+-Al3+ have been aggregatedin the aqueous solution and grown into nanorods of length similar to400 nm and aspect ratio similar to 12. Transmission electronmicroscopic (TEM) images indicate crystal growth mechanisms involvingparticle-to-particle oriented-attachment assisted by sulphur-sulphurcatenation leading to covalent-linkage. The nanorods exhibitself-assembly dependant luminescence properties such as quenching ofthe lattice defect-related emissions accompanied by the enhancement inthe dopant-related emission, efficient low-voltage electroluminescence(EL) and super-linear voltage-brightness EL characteristics. This studydemonstrates the technological importance of aggregation basedself-assembly in doped semiconductor nanosystems.

Item Type:	Journal Article
Publication:	Solid State Communications
Publisher:	Elsevier Science
Additional Information:	Copyright for this article belongs to Elsevier Science.
Keywords:	A. Nanostructures;A. Semiconductors;E. Luminescence
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	28 Jul 2005
Last Modified:	01 Mar 2012 09:51
URI:	http://eprints.iisc.ac.in/id/eprint/3464

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