Accession Number:

ADA202841

Title:

Electron Paramagnetic Resonance and Photoluminescence Studies of Impurities in CdTe

Descriptive Note:

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA CHEMISTRY AND PHYSICS LAB

Personal Author(s):

Report Date:

1988-10-31

Pagination or Media Count:

16.0

Abstract:

CdTe single crystals from different sources have been examined to detect the presence of impurities which may be detrimental to applications in the fabrication of infrared detectors. Distinctive EPR signals from various donor impurities, including substitutional paramagnetic Fe, were found in several samples. A photoluminescence transition at 1.1 eV was also seen in these crystals and the amplitudes of the photoluminescence signals and the Fe EPR signals are strongly correlated. Elemental analysis of the samples indicates that EPR and PL are able to detect Fe concentrations of less than 0.1 ppm. Keywords Electron paramagnetic resonance, Impurities in compound semiconductors, Defects in compound semiconductors, Iron, Cadmium tellurides.

Subject Categories:

  • Inorganic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE