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Surface states and photo-induced charge transfer on oxygen-terminated chemical vapor deposition diamond.
- Source :
- Journal of Applied Physics; Mar2011, Vol. 109 Issue 6, p063701, 4p, 1 Diagram, 2 Graphs
- Publication Year :
- 2011
-
Abstract
- Time-of-Flight (ToF) experiments were carried out to study the electrical transport and charge trapping properties of oxidized freestanding single crystalline (100) CVD diamond crystals. It is shown that the diamond surface and properties of the electrical contacts are of extreme importance, influencing measured charge carrier mobility values. While sputtered Al contacts yield textbook ToF spectra and electron mobilities μe exceeding 1860 cm2/Vs, thermally deposited contacts suffer from enhanced trapping. We propose a model in which the observed polarization effects can be explained by charge transfer to oxygen-related surface states, which interact with surface adsorbates, according to the well-known transfer-doping model. [ABSTRACT FROM AUTHOR]
- Subjects :
- CHARGE transfer
CHEMICAL vapor deposition
DIAMOND crystals
DIAMONDS
OXYGEN
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 109
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 59744450
- Full Text :
- https://doi.org/10.1063/1.3556748