RESEARCH ON THE ELECTRICAL PROPERTIES OF SEMI-CONDUCTORS

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 1/8 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 1/(temperature) which is included was a straight line. A value of 1.2x1017 carriers was estimated from an assumed room-temperature mobility of 2000 sq cm/v-sec.

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Document Details

Document Type
Technical Report
Publication Date
Sep 15, 1953
Accession Number
AD0021862

Entities

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Crystals
  • Electrical Engineering
  • Electrical Measurement
  • Electrical Properties
  • Engineering
  • Hall Effect
  • Heaters
  • Illinois
  • Induction Heating
  • Measurement
  • Mobility
  • P-N Junctions
  • Single Crystals
  • Students
  • Thermoelectricity
  • Universities

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics
  • Semiconductor Device Technology