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Analyses of Compensation Related Defects in II-VI Compounds

Published online by Cambridge University Press:  10 February 2011

A. Castaldini ,
A. Cavallini ,
P. Fernandez ,
B. Fraboni  and
J. Piqueras
A. Castaldini
Affiliation:
INFM and Department of Physics, University of Bologna, Bologna, Italy
A. Cavallini
Affiliation:
INFM and Department of Physics, University of Bologna, Bologna, Italy
P. Fernandez
Affiliation:
Departamento de Fisica de Materiales, Facultad de Ciencias Fisicas, Universidad Complutense, 28040 Madrid, Spain
B. Fraboni
Affiliation:
INFM and Department of Physics, University of Bologna, Bologna, Italy
J. Piqueras
Affiliation:
Departamento de Fisica de Materiales, Facultad de Ciencias Fisicas, Universidad Complutense, 28040 Madrid, Spain
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Abstract

The deep levels present in semiconducting CdTe and semi-insulating (SI) CdTe:Cl and Cd0.8Zn0.2 Te have been investigated by means of cathodoluminescence (CL), deep level transient spectroscopy (DLTS), photo-DLTS (PDLTS) and photo induced current transient spectroscopy (PICTS). PICTS and PDLTS can be applied to SI materials and allow to determine whether the observed deep levels are hole or electron traps.Among the observed deep centers, we have focused our attention on those involved in the compensation process such as the so called center A and the deep traps located near midgap. We have identified a deep acceptor, labelled H, and a deep donor, labelled E, the latter is peculiar to CdTe:Cl and can be a good candidate for the deep donor level needed to explain the compensation process in SI CdTe:Cl.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 487: Symposium I – Semiconductors for Room-Temperature Radiation II , 1997 , 269
Copyright
Copyright © Materials Research Society 1998

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