On natures of sub-gap photoelectric and optical spectra in nitrogen-contaminated nanocrystalline diamond
Data(s) |
2007
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Resumo |
Experimentally observed optical and photoelectrical spectra of nitrogen-contaminated (unintentionally doped) nano-crystalline CVD diamond films are simulated using semi-empirical adiabatic General Skettrup Model (GSM), which presumes dominant contributions of defect states from sp 3-coordinated intra-granular carbon atoms to intra-band single electron spectrum N(E) of the material. This picture disagrees with a common viewpoint that the N(E) spectrum of the gap states in diamond powders and polycrystalline CVD films mainly originates from π and π* bonds of sp2-coordinated carbon atoms, which are distributed nearly uniformly over outer surfaces and/or interfaces of the diamond grains. The GSM predicts as well strong effect of granular morphology on the density of intra-band defect states in polycrystalline diamonds. |
Identificador | |
Publicador |
The Electrochemical Society |
Relação |
DOI:10.1149/1.2812901 Ligatchev, V., Ong, K.P., Wu, P., & Ostrikov, K. (2007) On natures of sub-gap photoelectric and optical spectra in nitrogen-contaminated nanocrystalline diamond. ECS Transactions, 6(16), pp. 101-106. |
Direitos |
Copyright 2007 The Electrochemical Society |
Fonte |
Science & Engineering Faculty |
Tipo |
Journal Article |