Impurity doping of HgTe--CdTe superlattices during growth by molecular-beam epitaxy

Journal Article · Wed Mar 01 04:00:00 EST 1989 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.576199· OSTI ID:6759575

Wroge, M L; Peterman, D J; Feldman, B J; Morris, B J; Leopold, D J; Broerman, J G

We demonstrate the use of In and Ag as n- and p-type dopants, respectively, to controllably dope (100)-oriented HgTe--CdTe superlattices during molecular-beam epitaxial (MBE) growth. When normalized by the superlattice growth rate, the low-temperature Hall-carrier concentrations of both In- and Ag-doped superlattices are shown to have an exponential dependence on the respective effusion-cell temperatures in the electron and hole concentration ranges of approx.10/sup 16/ to 10/sup 18/ cm/sup -3/ . The upper limit on the diffusion coefficient for In at the low MBE growth temperature of approx.160 /sup 0/C is determined to be 5 x 10/sup -15/ cm/sup 2/ /s by use of secondary-ion mass spectrometry. Hall-effect and current--voltage measurements verify that the combination of In and Ag doping allows the formation of p--n electrical junctions. These results provide the first evidence of p--n junction formation in a HgTe--CdTe superlattice.

• Research Organization: McDonnell Douglas Research Laboratories, St. Louis, Missouri 63166
• OSTI ID: 6759575
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 7:2; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
CADMIUM COMPOUNDS
CADMIUM TELLURIDES
CHALCOGENIDES
CRYSTAL DOPING
CRYSTAL GROWTH
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
EPITAXY
HALL EFFECT
INDIUM ADDITIONS
INDIUM ALLOYS
MASS SPECTROSCOPY
MERCURY COMPOUNDS
MERCURY TELLURIDES
MOLECULAR BEAM EPITAXY
PHYSICAL PROPERTIES
SILVER ADDITIONS
SILVER ALLOYS
SPECTROSCOPY
SUPERLATTICES
TELLURIDES
TELLURIUM COMPOUNDS