Abstract
Hydrogen terminated intrinsic diamond is characterized using photoelectron emission spectroscopy. Samples have been annealed at temperatures Ta from 200to1000°C. The electron emission characteristics can be divided into three regimes: (I) (Ta<300°C) is governed by surface band bending which allows only excitons to reach the surface with subsequent dissociation. (II) (300°C⩽Ta⩽650°C) shows increased electron emission and the surface band bending has been removed. Here, excitons and electrons contribute. (III) (Ta>650°C) additional rise of emission is detected. The spectra are dominated by photon-phonon interactions which are discussed in detail.
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