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An insight into the mechanism of surface conductivity in thin film diamond

Looi, HJ; Pang, LYS; Molloy, AB; Jones, F; Foord, JS; Jackman, RB; (1998) An insight into the mechanism of surface conductivity in thin film diamond. DIAMOND AND RELATED MATERIALS , 7 (2-5) 550 - 555.

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Abstract

Diamond containing hydrogen at or near the surface displays p-type conductivity. The origin of this effect has been controversial. We have used I-V, Hall effect, SIMS, Raman, UPS and XPS to study hydrogenated polycrystalline CVD diamond films. The direct formation of acceptor states by hydrogen, which resides within the top 20 nm of the film, is the origin of the carriers present rather than surface band bending. Up to 10(19) holes cm(-3) can be measured and mobilities as high as 70 cm(2) Vs(-1) recorded. H-termination of the surface is important for the formation of high quality metal-diamond interfaces. (C) 1998 Elsevier Science S.A.

Type: Article
Title: An insight into the mechanism of surface conductivity in thin film diamond
Location: EDINBURGH, SCOTLAND
Keywords: surface conductivity, hydrogen, thin film diamond, carrier mobility, CHEMICAL-VAPOR-DEPOSITION, ELECTRICAL-PROPERTIES, HYDROGEN, LAYER
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute > Restorative Dental Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/139003
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