Emission characterization from nitrogen-doped diamond with respect to energy conversion

Franz A.M. Koeck, Robert J. Nemanich

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Vacuum thermionic energy converters utilize electron emissive materials as a key component in the transformation of thermal into electrical energy. Electron emission from nitrogen-doped diamond films was characterized with respect to the thermionic emission relation derived by Richardson-Dushman. Key parameters, which describe the emitter material, are the work function φ and the Richardson constant A. A fitting procedure has been employed to determine φ and A for nitrogen-doped diamond. However, a simultaneous solution to the Richardson-Dushman relation was limited due to the strongly coupled parameters φ and A. Additionally, the emission was characterized at various applied fields indicating a change in the electronic structure of the material contrary to classical thermionic emitters.

Original languageEnglish (US)
Pages (from-to)217-220
Number of pages4
JournalDiamond and Related Materials
Volume15
Issue number2-3
DOIs
StatePublished - Feb 1 2006
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

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