NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.46 [2008] >
IJPAP Vol.46(01) [January 2008] >


Title: Role of Cu additive in the density of localized states in a-Ge₂₀Se₈₀ glassy alloy
Authors: Singh, R
Tripathi, S K
Kumar, S
Keywords: Thin films
Chalcogenide glasses
Space charge limited conduction
Density of defect states
Issue Date: Jan-2008
Publisher: CSIR
Abstract: The dc conductivity at high electric fields in vacuum evaporated amorphous thin films of Ge₂₀Se₈₀ and (Ge₂₀Se₈₀)₉₈Cu₂ glassy alloys has been measured. Current-voltage (I-V) characteristics have been measured at various fixed temperatures. In these samples, ohmic behaviour is observed at low electric fields. However, at high electric fields (E~10⁴V/cm), non ohmic behaviour is observed. An analysis of the experimental data confirms the presence of space charge limited conduction (SCLC) in the glassy materials studied in the present case. From the fitting of the data to the theory of SCLC, the density of defect states (DOS) near Fermi level has been calculated. An increase in DOS has been found when we incorporate Cu in the pure binary Ge₂₀Se₈₀ glassy system. The peculiar role of Cu as a third element in the binary Ge₂₀Se₈₀ glassy alloy is also discussed.
Page(s): 38-41
ISSN: 0019-5596
Source:IJPAP Vol.46(01) [January 2008]

Files in This Item:

File Description SizeFormat
IJPAP 46(1) (2008) 38-41.pdf133.31 kBAdobe PDFView/Open
 Current Page Visits: 697 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 593337 since 06-Feb-2009  Last updated on 18-Sep-2014Webmaster: nopr@niscair.res.in