Université de Neuchâtel

NEA peak of the differently terminated and oriented diamond surfaces

Diederich, L. ; Aebi, Philipp ; Küttel, O. M. ; Schlapbach, Louis

In: Surface Science Letters, 1999, vol. 424, no. 2-3, p. L314-L320

The negative electron affinity (NEA) peak of differently terminated and oriented diamond surfaces is investigated by means of ultraviolet photoemission spectroscopy. Electron emission measurements in the range below the conduction band minimum (CBM) up to the vacuum level Evac permit the quantitative calculation of the upper limit of the NEA value. The inelastic scattering at the surface to the...

Université de Neuchâtel

Electron affinity and work function of differently oriented and doped diamond surfaces determined by photoelectron spectroscopy

Diederich, L. ; Küttel, O. M. ; Aebi, Philipp ; Osterwalder, Jürg

In: Surface Science, 1998, vol. 418, no. 1, p. 219-239

We investigate band bending, electron affinity and work function of differently terminated, doped and oriented diamond surfaces by X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS). The diamond surfaces were polished by a hydrogen plasma treatment and present a mean roughness below 10 Å. The hydrogen-terminated diamond surfaces have negative electron affinity (NEA), whereas the...