Electronic properties of deep levels inp‐type CdTe
作者:
R. T. Collins,
T. C. McGill,
期刊:
Journal of Vacuum Science&Technology A: Vacuum, Surfaces, and Films
(AIP Available online 1983)
卷期:
Volume 1,
issue 3
页码: 1633-1636
ISSN:0734-2101
年代: 1983
DOI:10.1116/1.572245
出版商: American Vacuum Society
关键词: deep energy levels;cadmium tellurides;crystal doping;doped materials;impurities;heating;sample preparation;charge carriers;tellurium;annealing;electrical properties;activation energy;valence bands;ev range;low temperature;medium temperature
数据来源: AIP
摘要:
DLTS and associated electrical measurements were made on unintentionally doped CdTe crystals obtained from several vendors, on Cu‐doped CdTe, and on Te‐annealed CdTe. All of the crystals werep‐type. Four majority carrier deep levels were observed in the temperature range from 100–300 K with activation energies relative to the valence band of 0.2, 0.41, 0.45, and 0.65 eV. Two of these levels were specific to certain crystals while the other two were seen in every sample and are attributed to common impurities or native defects. Fluctuations in the concentrations of levels across samples and as a result of modest sample heating (400 K) were also observed.
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