Simultaneous field emission and photoemission from diamond

Abstract

The electron field emission properties of the (111)1×1:H surface of natural semiconducting (p-type) diamond have been examined with simultaneous field emission and photoemission measurements. We find that the origin of the field emission is due to the electron tunneling from the valence band and show that the shape of the field emission energy distributions can be described by the theory of semiconductor field emission. Analysis of our results demonstrate that the combination of field emission and photoemission is a powerful technique for the study of the electron emission properties of materials.

Electron emission from diamond having negative electron affinity

“…Pate and others [37] and Geis and coworkers [38] reported that the height of the potential barrier of the boron-doped diamond is about 2 eV, in good agreement with the result obtained here. It is not clear whether the electron emission characteristics obtained are caused by NEA of the diamond.…”

“…From this result, electron emission from boron-doped and nitrogen-doped diamond has different mechanisms. Pate and others reported the electron emission mechanism from natural IIb type diamond containing boron [37]. They produced photoelectron emission and field electron emission at the same time.…”

“…In regard to the electron emission mechanism, there are models in which the non-diamond component in the diamond acts as a conductive channel [25], and defects in the diamond component contribute to electron emission in weak electric fields [31,37]. No quantitative analysis has been carried out in these models.…”

Electron emission from conduction band of diamond with negative electron affinity

“…A typical example which was shown to be Type (iii) was the natural IIb diamond. The origin was found to be at the VBM by Bandis and Pate in 1996 [23].…”

Field Emission Characteristics of Phosphorus-Doped Diamond Films

“…These results suggested that electrons injected from the cathode metal into the diamond film were emitted from the surface of diamond films. In contrast to this, it was demonstrated by ultraviolet photoelectron spectroscopy and simultaneous field emission measurements that electrons in the valence band were emitted for B-doped diamond [15]. It was also found that a reduction in the turn-on voltage of the electron emission occurred with increasing SP2 component in diamond films.…”