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2010 | 118 | 3 | 511-514
Article title

High Temperature Surface Conductivity of Hydrogenated Diamond Films Exposed to Humid Air

Content
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EN
Abstracts
EN
Surface conductivity of thin diamond films was measured as a function of temperature up to 450°C. Hydrogenated diamond was synthesized by chemical vapor deposition in hydrogen/carbon plasma. Low values of charge carrier activation energy ( ≈ 10 meV) were observed, when hydrogenated diamond films were exposed to the ambient humid air. However, the activation energy increased by two orders of magnitude as film temperature exceeded 300°C. We have attributed this behavior to the desorption of the H_2O adlayer. The jump of the activation energy did not occur, when experiment was performed in vacuum. We have also shown that donor doping leads to the up-shift of the Fermi level much above the acceptor-like band gap levels induced by surface C-H bonds, which cannot be compensated by transfer of electrons from diamond to the double H-H_2O layer.
Keywords
EN
Publisher

Year
Volume
118
Issue
3
Pages
511-514
Physical description
Dates
published
2010-09
Contributors
author
  • Institute of Physics, Nicolaus Copernicus University, Grudziądzka 5/7, 87-100 Toruń, Poland
author
  • Institute of Physics, Nicolaus Copernicus University, Grudziądzka 5/7, 87-100 Toruń, Poland
author
  • Department of Bases of Theoretical Biomedical Studies and Medical Computer Science, Collegium Medicum, Nicolaus Copernicus University, Jagiellońska 13, 85-067 Bydgoszcz, Poland
References
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  • 2. C.E. Nebel, H. Kato, B. Rezek, D. Shin, D. Takeuchi, H. Watanabe, T. Yamamoto, Diamond Relat. Mater. 15, 264 (2006)
  • 3. J. Ristein, M. Riedel, F. Maier, B.F. Mantel, M. Stammler, L. Ley, J. Phys., Condens. Matter 13, 8979 (2001)
  • 4. F. Maier, M. Riedel, B.F. Mantel, J. Ristein, L. Ley, Phys. Rev. Lett. 85, 3472 (2000)
  • 5. J. Ristein, Surf. Sci. 600, 3677 (2006)
  • 6. L. Ley, J. Ristein, F. Maier, M. Riedel, P. Strobel, Physica B 262, 376 (2006)
  • 7. J. Ristein, J. Phys. D, Appl. Phys. 39, R71 (2006)
  • 8. J. Ristein, P. Strobel, L. Ley, Adv. Sci. Technol. 48, 93 (2006)
  • 9. V. Chakrapani, J.C. Angus, A.B. Anderson, S.D. Wolter, B.S. Stoner, G.U. Sumanasekara, Science 318, 1424 (2007)
  • 10. A.N. Andriotis, G. Mpourmpakis, E. Richter, M. Menon, Phys. Rev. Lett. 100, 106801 (2008)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv118n316kz
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