Photoluminescence investigation of p-to-n conversion in CdTe by annealing in Cd atmosphere

The p-to-n conversion of CdTe single crystals caused by low temperature annealing in cadmium atmosphere is investigated by photoluminescence (PL), electron beam induced current method (EBIC) and galvanomagnetic measurements. We show that PL of excitons bound to silver, copper and sodium neutral acce...

Full description

Saved in:
Bibliographic Details
Main Authors: Horodysky, P., Belas, E., Franc, J., Grill, R., Hlidek, P., Toth, A.L.
Format: Conference Proceeding
Language:English
Subjects:
Annealing
Atmosphere
Atmospheric measurements
Cadmium
Crystals
Current measurement
Electron beams
Excitons
Photoluminescence
Temperature
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The p-to-n conversion of CdTe single crystals caused by low temperature annealing in cadmium atmosphere is investigated by photoluminescence (PL), electron beam induced current method (EBIC) and galvanomagnetic measurements. We show that PL of excitons bound to silver, copper and sodium neutral acceptors in the converted n-type exhibits drastic reduction (about three orders of magnitude) comparing to unconverted p-type or as grown crystal. Simultaneously, we observe that cadmium substitutional acceptors diffuse fast interstitially into remaining p-type, where they recombine with Cd vacancies and accumulate in the sample core. Concentration of donors is only slightly modified. This effect has a potential application in preparation of pure n-type CdTe samples
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2004.1466879