Spatially and Spectrally Resolved Cathodoluminescence of Hot-Filament Chemical-Vapor-Deposited Diamond Particles

Abstract

Spectrally resolved cathodoluminescence (CL) image and spatially resolved CL spectra were obtained from two specimens grown by hot-filament chemical vapor deposition. Each specimen consisted of a large number of unconnected diamond particles with cubo-octahedral and pseudo-five-fold twinned growth habits. The growth temperature was nominally 600 deg C for one specimen and 750 deg C for the other. In the 1.5-3.5 eV range, the spectra are composed of four defect and impurity related bands: there are three bands with zero- phonon lines at 1.68 eV, 2.156 eV, and 2.325 eV, and one broad band centered at 2.85 eV. A weak at 5.27 eV, due to exciton recombination, was also observed. Spectrally resolved images to the two most intense CL bands, at 2.126 eV and 2. 85 eV, were obtained for several particles. In the low temperature specimen, bright regions in images of the 2.85 eV band are correlated in some cases with the central regions of (100) facets.

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Document Details

Document Type
Technical Report
Publication Date
Apr 24, 1991
Accession Number
ADA236485

Entities

People

  • Albert R. Feldman
  • Edward N. Farabaugh
  • Lawrence H. Robins

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bandpass Filters
  • Chemical Vapor Deposition
  • Crystal Lattice Vibrations
  • Dislocations
  • Electron Beams
  • Electron Holes
  • Electron Microscopes
  • Electrons
  • Emission
  • Energy Bands
  • Ground State
  • Low Temperature
  • Materials
  • Nitrogen
  • Phonons
  • Scanning Electron Microscopes
  • Spatial Distribution

Fields of Study

  • Materials science

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene