NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.43 [2005] >
IJPAP Vol.43(08) [August 2005] >

Title: High field conduction in amorphous thin films of Se70Te30-xCdx in dark and in the presence of light
Authors: Kushwaha, V S
Mehta, N
Kumar, A
Keywords: Chalcogenide glasses
Amorphous semiconductors
High field conduction
Poole-Frenkel effect
Thin films
Issue Date: Aug-2005
Publisher: CSIR
IPC CodeH01L
Abstract: Glassy alloys of Se70Te30-xCdx (x = 2, 4, 6) are prepared by the quenching technique. Amorphous thin films of these alloys are prepared by the vacuum evaporation technique. Current–voltage (I-V) characteristics have been studied at various temperatures in the films in dark and in the presence of light. For this purpose, a dc voltage (0 – 300 V) was applied across the film. I-V characteristics show that, at low electric fields, an ohmic behaviour is observed. However, at high electric fields (E ~ 104 V/cm), the current becomes super ohmic. Analysis of the data shows the absence of space charge limited currents in amorphous Se70Te30-xCdx thin films as ln I/V versus V curves are not found to be straight lines with high correlation coefficient. Instead, ln I versus V1/2 curves are found to be straight lines having high correlation coefficient. The slope of these curves decreases with the increase in temperature. A more detailed analysis shows that the dominant mechanism of conduction is of Poole-Frenkel type in dark as well as in the presence of light.
Page(s): 630-635
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.43(08) [August 2005]

Files in This Item:

File Description SizeFormat
IJPAP 43(8) 630-635.pdf347.24 kBAdobe PDFView/Open
 Current Page Visits: 141 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  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 © 2015 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: 164383 since 01-Sep-2015  Last updated on 21-Jun-2016Webmaster: