Compositions – Electrically conductive or emissive compositions – Light sensitive
Patent
1986-08-21
1989-03-28
Barr, Josephine
Compositions
Electrically conductive or emissive compositions
Light sensitive
252514, 252512, 252518, H01B 106, H01C 1300
Patent
active
048161837
ABSTRACT:
A composite photosensitive material of enhanced sensitivity to, and absorption of, incident radiation, wherein an array of particles of an electrically conducting material is embedded in and dispersed through a semiconducting matrix transparent to the wavelengths of interest, the particles having sizes of from about 1 to about 100 nanometers and having volume fractions of at least about 10 percent. The composite material is usable in photosensitive device applications such as detectors, photocells, photodiodes, and vidicons. Sensitivity to infrared radiation is particularly high where the matrix has a dielectric constant of at least about 10. The preferred particle material for enhanced infrared sensitivity is silver or gold, and the preferred matrix is silicon of CuInSe.sub.2.
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"Photoemission from Ag-O-Cs", by Clayton W. Bates, Jr., Phys. Rev. Letters, vol. 47, No. 3, Jul. 20, 1981, (pp. 204-208).
"Enhanced Raman Scattering from Cesium Suboxides on Silver Particles and the Structure of S-1 Photocathodes", by Clayton W. Bates, Jr., Appl. Phys. Letters, 45(10), Nov. 15, 1984, (pp. 1058-1059).
"Optical Properties of Inhomogenous Composite Materials", by N. Alexander and C. W. Bates, Jr., Solid State Comm., vol. 51, No. 5, pp. 331-333, 1984.
Barr Josephine
Garmong Gregory O.
The Board of Trustees of the Leland Stanford Junior University
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