Accession Number:

AD0647294

Title:

DEVELOPMENT OF TECHNIQUES FOR PREPARING HOMOGENEOUS SINGLE CRYSTALS OF LEAD TELLURIDE, LEAD SELENIDE, AND LEAD SULFIDE

Descriptive Note:

Quarterly progress rept. no. 18, 15 Oct 1965-15 Jan 1966

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

• Moody, J. W.
• Miller, J. F.
• Himes, R. C.

Report Date:

1966-01-15

Pagination or Media Count:

17.0

Abstract:

Experimental work was concerned primarily with investigation of the effects of mercury doping on the electrical properties of PbTe. Investigation of the distribution of platinum and mercury in PbTe crystals by emission spectrographic analysis indicates that platinum is rejected from the freezing solid and tends to be concentrated in the last-to-freeze portions of the crystal. Mercury concentrations are found to be higher in the first-to-freeze portions of the crystals, but mean concentrations are low, indicating that mercury is evolved into the vapor phase of the system. The measured electrical properties of the mercury-doped PbTe crystals were not significantly different from those of undoped PbTe prepared and treated under similar conditions thus, the role of mercury as a dopant in PbTe was not made apparent.

Descriptors:

• *CRYSTAL GROWTH
• *LEAD COMPOUNDS
• *MERCURY
• *TELLURIDES
• CHARGE CARRIERS
• CONCENTRATION(CHEMISTRY)
• DOPING
• ELECTRICAL RESISTANCE
• FREEZING
• HALL EFFECT
• HEAT TREATMENT
• PHASE STUDIES
• PLATINUM
• SELENIDES
• SINGLE CRYSTALS
• SPECTROSCOPY
• SULFIDES

Subject Categories:

• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE