The role of adsorbates and defects on diamond surfaces

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Ristein J, Ley L
Zeitschrift: New Diamond and Frontier Carbon Technology
Jahr der Veröffentlichung: 2000
Band: 10
Seitenbereich: 363
ISSN: 1344-9931


Abstract

The influence of surface termination, defects, and adsorbates on the electronic properties of diamond surfaces is discussed. Hydrogen passivation leads to a negative electron affinity of diamond surfaces due to a dipole layer which is induced by the heteropolar carbon-hydrogen bonds of the surface atoms. This aspect is discussed quantitatively. Next, the role of surface defects is addressed and the correlation between the position of the surface Fermi level and the concentration of surface defects is discussed for p-type diamond. Finally, experiments combining total photoelectron yield spectroscopy and in situ conductivity measurements are reported which elucidate the phenomenon of surface conductivity of hydrogenated diamond. An electrochemical model is proposed to explain this unique feature of diamond surfaces.


FAU-Autoren / FAU-Herausgeber

Ley, Lothar Prof. Dr.
Naturwissenschaftliche Fakultät
Ristein, Jürgen apl. Prof. Dr.
Lehrstuhl für Laserphysik

Zuletzt aktualisiert 2018-09-08 um 05:53