Accession Number : ADA292159

Title :   Composite Material Studies for Low Temperature Thermionic Emission.

Descriptive Note : Final rept. 1 May 92-31 Dec 93,

Corporate Author : STANFORD UNIV CA

Personal Author(s) : Bates, Clayton W., Jr

PDF Url : ADA292159

Report Date : 26 MAY 1994

Pagination or Media Count : 3

Abstract : The primary objectives of this project were to prepare and measure the photoemissive properties of metal-semiconductor inhomogeneous composite systems for use as low temperature thermionic emitters. The system investigated in this study was Au-CuInSe2 where the Au was in the form of particles 5-50 nm in size dispersed throughout p-type CuInSe2. Much like oxide-coated cathodes the surface of this composite must be treated in order to reduce the barrier to emission of electrons. If the electron affinity of the semiconductor is made close to zero or negative by appropriate surface treatments one has a system with an electron thermal energy barrier of 1 eV at room temperature. (MM)

Descriptors :   *SEMICONDUCTORS, *THERMIONIC EMISSION, LOW TEMPERATURE, COMPOSITE MATERIALS, ELECTRON DENSITY, SILVER ALLOYS.

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE