Ultra thin transition metal oxide coatings on diamond for thermionic applications

Tiwari, Amit K.School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne (författare)

Godkänd; 2013; 20140520 (andbra)
We have investigated, using density functional simulations, the energetics and the electronic properties of oxides of selected transition metals, TMs, adsorbed onto a diamond (001) surface. We find that stoichiometric oxides of TMs, particularly Ti and Zn, influence the electron affinity of diamond strongly. The electron affinities of stoichiometric oxides of Ti and Zn are calculated to be around -3eV, significantly higher than 1.9eV of commonly used H-termination. The reactions of TMs with an oxygenated diamond are found to be highly exothermic. Based upon the energetics and the electronic properties, we propose that in the regime of ultra thin films, oxides of TMs are promising options for surface coating of diamond-based electron emitters, as these coatings are compatible with semiconductor device fabrication processes, while having the benefit of inducing a large negative electron affinity

Goss, Jonathan P.G.School of Electrical, Electronic and Computer Engineering, University of Newcastle upon Tyne (författare)
Briddon, Patrick R.Electrical, Electronic and Computer Engineering, University of Newcastle upon Tyne (författare)
Wright, Nick G.School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne (författare)
Horsfall, Alton B.School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne (författare)
Rayson, MarkLuleå tekniska universitet,Matematiska vetenskaper(Swepub:ltu)rayson (författare)
School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon TyneSchool of Electrical, Electronic and Computer Engineering, University of Newcastle upon Tyne (creator_code:org_t)

Ingår i:Proceedings of the MRS Fall Meeting Symposim, MRS Fall Meeting, 24-29 November 2012, Boston, USAWarrendale : Materials Research Society, s. 13-18
Ingår i:MRS ProceedingsWarrendale : Materials Research Society, s. 13-181946-4274

Av författaren/redakt...: Tiwari, Amit K.; Goss, Jonathan P ...; Briddon, Patrick ...; Wright, Nick G.; Horsfall, Alton ...; Rayson, Mark

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