- Tytuł:
- High Temperature Surface Conductivity of Hydrogenated Diamond Films Exposed to Humid Air
- Autorzy:
-
Stec, K.
Szroeder, P.
Benzhour, K. - Powiązania:
- https://bibliotekanauki.pl/articles/1536522.pdf
- Data publikacji:
- 2010-09
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
73.25.+i
81.05.ug - Opis:
- 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.
- Źródło:
-
Acta Physica Polonica A; 2010, 118, 3; 511-514
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł