Accession Number:

AD0021862

Title:

RESEARCH ON THE ELECTRICAL PROPERTIES OF SEMI-CONDUCTORS

Descriptive Note:

Status rept. no. 4

Corporate Author:

ILLINOIS UNIV AT URBANA ELECTRICAL ENGINEERING RESEARCH LAB

Personal Author(s):

Report Date:

1953-09-15

Pagination or Media Count:

6.0

Abstract:

Studies are being made of the semiconducting properties of single crystals of PbTe. Prolonged heating of the Pb in a Vycor vessel before adding the Te apparently aided in the removal of oxides. The excess Pb excluded during growth appeared as a free-Pb cap on the end of the crystal. The crystal was cleaved into slices about 18 in. thick to measure the thermoelectric effect. The top slice was n type the others were p type. A p-n juncture was found. Tesistivity rho measurements were made over a small temperature range approximately 200 deg to 375 deg K for 1 n-type sample. The plot of the 1n rho vs 1temperature which is included was a straight line. A value of 1.2x1017 carriers was estimated from an assumed room-temperature mobility of 2000 sq cmv-sec.

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE