Optical Characteristics of Ultrathin Oligosilane Films Prepared by Molecular Beam Deposition Method
In order to investigate the correlation between the molecular orientation and the optical characteristics of ultrathin films of permethyl-dodecasilane, CH 3 {Si(CH 3 ) 2 } 12 CH 3 (DM12), we grew the films on quartz, KBr and KCl by molecular beam deposition, and characterized them by optical absorpt...
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Published in | Japanese Journal of Applied Physics Vol. 37; no. 8A; p. L953 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.08.1998
|
Online Access | Get full text |
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Summary: | In order to investigate the correlation between the molecular
orientation and the optical characteristics of ultrathin
films of permethyl-dodecasilane,
CH
3
{Si(CH
3
)
2
}
12
CH
3
(DM12), we grew the films
on quartz, KBr and KCl by molecular beam deposition, and characterized
them by optical absorption, photoluminescence (PL), and photoexcitation spectroscopy and atomic force microscopy.
We found that DM12 molecules formed a monolayer on quartz
with their molecular chains perpendicular to the surface, while DM12
films grew on KBr and KCl with their molecular axis oriented parallel to the
surfaces. These films exhibited quite different absorption spectra
as a result of their molecular orientation and the interaction between
molecules. The PL spectra obtained for the films
on quartz and KBr were, however, almost the same, indicating that the
origin of the luminescence was the localized states such as defects on
the chains. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.37.L953 |