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Realization of highly conducting n-type diamond by phosphorus ion implantation

MetadataDetails
Publication Date2021-03-08
JournalApplied Physics Letters
AuthorsDhruba Das, Asokan Kandasami, M. S. Ramachandra Rao
InstitutionsInter-University Accelerator Centre, Indian Institute of Technology Madras
Citations22

We report on the formation of n-type ultra-nanocrystalline diamond exhibiting high electrical conductivity, σRT ∼104 Ī©āˆ’1 māˆ’1 by phosphorus ion implantation. The Raman study confirms the restoration of crystallinity upon high vacuum and high-temperature annealing post-implantation process at 850 °C. Varying the fluence enabled us to obtain a reduced thermal activation energy of Ea ∼8 meV with a very high carrier concentration of ne ∼1021 cmāˆ’3. Hall measurements confirm the n-type nature in phosphorus-implanted diamond at a high fluence of 1016 ions/cm2, and the nonlinear Hall effect reveals the signature of two band conduction mechanism, one via the impurity band and the other through the conduction band.

  1. 2012 - Ultrananocrystalline Diamond: Synthesis, Properties and Applications