Thermally enhanced photoinduced electron emission from nitrogen-doped diamond films on silicon substrates

Tianyin Sun, Franz A M Koeck, Aram Rezikyan, Michael Treacy, Robert Nemanich

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

This work presents a spectroscopic study of the thermally enhanced photoinduced electron emission from nitrogen-doped diamond films prepared on p-type silicon substrates. It has been shown that photon-enhanced thermionic emission (PETE) can substantially enhance thermionic emission intensity from a p-type semiconductor. An n-type diamond/p-type silicon structure was illuminated with 400-450 nm light, and the spectra of the emitted electrons showed a work function less than 2 eV and nearly an order of magnitude increase in emission intensity as the temperature was increased from ambient to ∼400 °C. Thermionic emission was negligible in this temperature range. The results are modeled in terms of contributions from PETE and direct photoelectron emission, and the large increase is consistent with a PETE component. The results indicate possible application in combined solar/thermal energy conversion devices.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number12
DOIs
StatePublished - Sep 15 2014

Fingerprint

Thermionic emission
thermionic emission
Electron emission
Diamond films
Silicon
diamond films
electron emission
Nitrogen
nitrogen
silicon
Substrates
Photons
photons
p-type semiconductors
Diamond
energy conversion
Photoelectrons
Thermal energy
Energy conversion
thermal energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Thermally enhanced photoinduced electron emission from nitrogen-doped diamond films on silicon substrates. / Sun, Tianyin; Koeck, Franz A M; Rezikyan, Aram; Treacy, Michael; Nemanich, Robert.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 12, 15.09.2014.

Research output: Contribution to journalArticle

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