Work function and electron affinity of the fluorine-terminated (100) diamond surface

K. J. Rietwyk; S. L. Wong; L. Cao; K. M. Odonnell; L. Ley; A. T.S. Wee; C. I. Pakes

doi:10.1063/1.4793999

Work function and electron affinity of the fluorine-terminated (100) diamond surface

K. J. Rietwyk, S. L. Wong, L. Cao, K. M. Odonnell, L. Ley, A. T.S. Wee, C. I. Pakes

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Abstract

The work function and electron affinity of fluorine-terminated (100) diamond surfaces prepared by exposure to dissociated XeF₂ have been determined using synchrotron-based photoemission. After vacuum annealing to 350°C a clean, monofluoride terminated C(100):F surface was obtained for which an electron affinity of 2.56 eV was measured. This is the highest electron affinity reported for any diamond surface termination so far, and it exceeds the value predicted by recent density functional theory calculations by 0.43 eV. The work function of 7.24 eV measured for the same surface places the Fermi energy of 0.79 eV above the valence band maximum.

Original language	English
Article number	091604
Journal	Applied Physics Letters
Volume	102
Issue number	9
DOIs	https://doi.org/10.1063/1.4793999
State	Published - 4 Mar 2013
Externally published	Yes

Bibliographical note

Funding Information:
We acknowledge financial support from the Australian Research Council under DP0879827 and the Award to K.R. of an Australian Nanotechnology Network Overseas Travel Fellowship. C.P. and K.R. thank the National University of Singapore for their generous hospitality.

Funding

We acknowledge financial support from the Australian Research Council under DP0879827 and the Award to K.R. of an Australian Nanotechnology Network Overseas Travel Fellowship. C.P. and K.R. thank the National University of Singapore for their generous hospitality.

Funders	Funder number
Australian Research Council	DP0879827

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abstract = "The work function and electron affinity of fluorine-terminated (100) diamond surfaces prepared by exposure to dissociated XeF2 have been determined using synchrotron-based photoemission. After vacuum annealing to 350°C a clean, monofluoride terminated C(100):F surface was obtained for which an electron affinity of 2.56 eV was measured. This is the highest electron affinity reported for any diamond surface termination so far, and it exceeds the value predicted by recent density functional theory calculations by 0.43 eV. The work function of 7.24 eV measured for the same surface places the Fermi energy of 0.79 eV above the valence band maximum.",

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AU - Ley, L.

AU - Wee, A. T.S.

AU - Pakes, C. I.

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Work function and electron affinity of the fluorine-terminated (100) diamond surface

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