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Robertson J, Silva SRP, Amaratunga GAJ, Milne WI. Electron Field Emission From Diamond-Like Carbon. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-423-777] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractThe low electron affinity of a-C:H is related to that of diamond surfaces and is studied using a chemical bonding model. The electron field emission from hydrogenated amorphous carbon (a-C:H) and nitrogen modified a-C:H showing low turn on fields are described. Nitrogen improves the field emission, apparently by raising the Fermi level.
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Abstract
ABSTRACTDoping in hydrogenated amorphous silicon occurs by a process of an ionised donor atom partially compensated by a charged dangling bond. The total energies of various dopant and dopant/bonding combinations are calculated for tetrahedral amorphous carbon. It is found that charged dangling bonds are less favoured because of the stronger Coulombic repulsion in ta-C. Instead the dopants can be compensated by weak bond states in the lower gap associated with odd-membered π-rings or odd-numbered π-chains. The effect is that the doping efficiency is low but there are not charged midgap recombination centres, to reduce photoconductivity or photoluminescence with doping, as occurs in a-Si:H.
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Affiliation(s)
- C. Godet
- a Laboratoire de Physique des Interfaces et des Couches Minces, Unité Mixte de Recherche 7647 CNRS-Ecole Polytechnique , 91128 , Palaiseau Cedex , France
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Gueorguiev G, Furlan A, Högberg H, Stafström S, Hultman L. First-principles calculations on the structural evolution of solid fullerene-like CPx. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.05.087] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Claeyssens F, Allan NL, May PW, Ordejón P, Oliva JM. Solid phosphorus carbide? Chem Commun (Camb) 2002. [DOI: 10.1039/b207743b] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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