Electron irradiation of p-type mercury cadmium telluride. Master's thesis

Technical Report · Sat Jun 01 04:00:00 EDT 1985

OSTI ID:6209107

Morral, D G

30-MeV electrons were used to irradiate samples of p-type Hg/sub 1-x/ Cd/sub x/Te to study radiation induced changes in conductivity versus temperature. Samples were held below 95 K while irradiated with doses between 4 x 10/sup 13/ electrons/cm/sup 2/ and 6 x 10/sup 15/ electrons/cm/sup 2/. Litle or no changes in conductivity was detected for the lower dose levels. Conductivity steadily decreased with increasing dose level, showing a 50% decline at 100 K for the maximum dose. The decrease in conductivity was smaller at higher temperatures. Approximately two hour post-irradiation temperature excursions up to 300 K, resulted in a 25% restoration of the conductivity at 100 K. The mobility of the samples, irradiated at the maximum dose level, showed a 3 to 6 fold increase, while the majority carrier concentration decreased by a factor of 7 to 10 times the pre-irradiation values. All samples irradiated with dose levels above 1 x 10 /sup 15/ electrons/cm/sup 2/, converted from p to n-type at 295 K, but remained p-type at 77 K. It was hypothesized that radiation-induced donor defect levels in the conduction band were responsible for the reported changes.

• Research Organization: Naval Postgraduate School, Monterey, CA (USA)
• OSTI ID: 6209107
• Report Number(s): AD-A-159737/6/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
CADMIUM COMPOUNDS
CADMIUM TELLURIDES
CHALCOGENIDES
CHARGE CARRIERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY RANGE
LOW TEMPERATURE
MEDIUM TEMPERATURE
MERCURY COMPOUNDS
MERCURY TELLURIDES
MEV RANGE
MEV RANGE 10-100
MOBILITY
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SAMPLING
TELLURIDES
TELLURIUM COMPOUNDS
TEMPERATURE DEPENDENCE