Microstructure, optical and photoluminescence properties of simple thermal evaporated CdS nanocrystalline films

Reddy, Sreekantha D and Kang, B and Yu, Seong-Cho and Gunasekhar, KR and Rao, Narasimha K and Divya, A and Reddy, Sreedhara P (2007) Microstructure, optical and photoluminescence properties of simple thermal evaporated CdS nanocrystalline films. In: Journal of Optoelectronics and Advanced Materials, 9 (12). 3747 -3750.

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Abstract

CdS nanocrystalline films were deposited on glass substrates by thermal evaporation at 300 K and 573K. All the films exhibited wurtzite structure with crystallite size varied from 10 - 20 nm. The sharp sudden fall of optical transmittance spectra shifted from 485 nm to 455 nm with increasing substrate temperature. The excitation wavelength of all films is about 500 nm and emission wavelengths 545 nm and 570 nm for all films. The possible optical and photoluminescence mechanisms are proposed in this paper. The photoluminescence of CdS nanocrystalline films enables them to have important applications in optoelectronic devices.

Item Type:	Journal Article
Publication:	Journal of Optoelectronics and Advanced Materials
Publisher:	Integra Natura Omnia et Aeterna
Additional Information:	Copyright of this article belongs to Integra Natura Omnia et Aeterna.
Keywords:	CdS nanocrystalline films;Resistive thermal evaporation;Microstructure;Optical properties;Photoluminescence properties.
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	26 Aug 2008
Last Modified:	19 Sep 2010 04:49
URI:	http://eprints.iisc.ac.in/id/eprint/15670

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