Surface transfer doping of diamond with a molecular heterojunction

D. P. Langley, Y. Smets, C. B. Stark, M. T. Edmonds, A. Tadich, K. J. Rietwyk, A. Schenk, M. Wanke, Q. H. Wu, P. J. Barnard, L. Ley, C. I. Pakes

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Surface conductivity and C1s core level measurements were employed to show that surface transfer doping of hydrogen-terminated diamond C(100) can be achieved with a molecular heterojunction formed with C 60F 48 and an intralayer of zinc-tetraphenylporphyrin. Measurement of the shift in the diamond Fermi energy shows that the zinc-tetraphenylporphyrin (ZnTPP) layer modifies the C 60F 48-diamond interaction, modulating the extent of charge transfer between the diamond and the fluorofullerene. In contrast to the case of C 60F 48 acceptors, the presence of a ZnTPP layer prevents the formation of air-induced surface conductivity, showing that the intralayer acts to selectively separate these two doping channels.

Original languageEnglish
Article number032103
JournalApplied Physics Letters
Issue number3
StatePublished - 16 Jan 2012
Externally publishedYes

Bibliographical note

Funding Information:
We acknowledge financial support of the Australian Research Council.


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