Optical Properties of Composite Materials.

Abstract

In this report we present a study of the optical and electrical properties of hydrogenated silicon-germanium alloys prepared by co-sputtering. The optical absorption coefficient alpha was evaluated both from optical transmission and from photoconductivity measurements. The data derived using the two methods are in good agreement. The values of alpha as a function of photon energy exhibit a shift to lower energies with increasing germanium content, indicating a decreasing band gap. For all the concentrations, the absorption coefficient drops rapidly with decreasing energy, indicating a fairly good structural order and low trap density.

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Document Details

Document Type
Technical Report
Publication Date
Sep 20, 1984
Accession Number
ADA146768

Entities

People

  • J. A. Muir
  • M. G. Rodriguez
  • Z. S. Weisz

Organizations

  • University of Puerto Rico

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Auger Electron Spectroscopy
  • Auger Electrons
  • Composite Materials
  • Electrical Conductivity
  • Electrical Properties
  • Electron Spectroscopy
  • Germanium
  • Germanium Alloys
  • Glow Discharges
  • Materials
  • Optical Properties
  • Photoconductivity
  • Solar Cells
  • Spectra
  • Spectroscopy

Fields of Study

  • Materials science

Readers

  • Semiconductor Device Technology
  • Spectroscopy.
  • Thin Film Deposition Science.