ACOUSTOELECTRIC OSCILLATIONS, CURRENT SATURATION AND ELECTRON DRIFT MOBILITY IN CADMIUM SULPHIDE CRYSTALS,

Abstract

Interaction between acoustic waves and conduction electrons in the piezoelectric semiconductor CdS is considered. A short theoretical discussion of acoustic amplification, current saturation and the temperature dependence of electron drift mobility is given. Current saturation due to acoustic oscillations in CdS is observed, both in a transverse mode and in a longitudinal mode. A method for determining the threshold field for oscillation, utilizing the build up time for current saturation under applied pulsed dc electric field, is discussed. The threshold field is used to determine the electron drift mobility for photoconducting CdS in the temperature range from 204 degrees K to 438 degrees K. The temperature dependence of the mobility can be described as a combination of scattering from lattice vibration and trapping by two impurity levels.

Document Details

Document Type
Technical Report
Publication Date
Nov 18, 1966
Accession Number
AD0654003

Entities

People

  • Andreas Rannesrad

Tags

DTIC Thesaurus Topics

  • Acoustic Waves
  • Crystal Lattice Vibrations
  • Crystal Lattices
  • Electric Fields
  • Electrons
  • Mobility
  • Oscillation
  • Piezoelectric Semiconductors
  • Saturation
  • Scattering
  • Semiconductors
  • Waves

Fields of Study

  • Materials science
  • Physics

Readers

  • Materials Science and Engineering.
  • Pulsed Power and Plasma Physics.
  • Structural Dynamics.

Technology Areas

  • Microelectronics