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Band Model for Electron Emission from Diamond and Diamond-Like Carbon

Published online by Cambridge University Press:  10 February 2011

J Robertson
J Robertson*
Affiliation:
Engineering Dept, Cambridge University, Cambridge CB2 1PZ, UK
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Abstract

The band diagram is constructed for diamond on metal and diamond-like carbon on metal emitters, from data for electron affinities, Schottky barrier heights or band offsets. For diamond, there is a large offset for the conduction band at the back-contact, causing this to be the dominant barrier for emission. Nitrogen and perhaps grain boundaries reduce this barrier by forming a depletion layer of ionised donors, which narrows the tunnelling distance. In DLC, there is little conduction band offset at the back-contact, and the dominant barrier is at the surface. Nitrogen now lowers the emission barrier by raising the bulk Fermi level and lowering the work function. Unresolved problems are also pointed out.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 471: Symposium G – Flat Panel Display Materials III , 1997 , 217
Copyright
Copyright © Materials Research Society 1997

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References

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