Heavily phosphorus-doped nano-crystalline diamond electrode for thermionic emission application

Thermionic emission from phosphorus (P) doped diamond nanocrystals supported by conical carbon nanotubes and ultraviolet photoelectron spectroscopy study of P-doped diamond films

a Department of Physics and Astronomy, University of Louisville, Louisville 40292, KY, United States b Department of Materials Science & Engineering, Iowa State University, Ames 50011, IA, United States c Department of Chemical Engineering, University of Louisville, Louisville 40292, KY, United States d Conn Center for Renewable Energy Research, University of Louisville, Louisville 40292, KY, U...

Thermionic emission from surface-terminated nanocrystalline diamond

Thermionic electron emission forms the basis of both electron sources for a variety of applications and a direct energy conversion process that is compact and scalable. The present study characterizes thermionic emission from boron-doped nanocrystalline diamond films with hydrogen and nitrophenyl surface termination layers. A hemispherical energy analyzer was used to measure electron energy dis...

Beta Radiation Enhanced Thermionic Emission from Diamond Thin Films

Diamond-based thermionic emission devices could provide a means to produce clean and renewable energy through direct heat-to-electrical energy conversion. Hindering progress of the technology are the thermionic output current and threshold temperature of the emitter cathode. In this report, we study the effects on thermionic emission caused by in situ exposure of the diamond cathode to beta rad...

Thermionic Emission from Diamond Films in Molecular Hydrogen Environments

Diamond-based low-work function thermionic electron emitters are in high demand for applications ranging from electron guns and space thrusters to electrical energy converters. A key requirement of such diamond-based electron sources is hydrogen termination of the surfaces which can significantly reduce the emission barrier. However, at high temperatures (≤600°C), terminated hydrogen begins to ...

Advantage on Superconductivity of Heavily Boron-Doped (111) Diamond Films