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Analysis of hydrogen and paramagnetic defects in aSi: H aerosol particles. Resulting from thermal decomposition of silane
Author(s) -
Onischuk A. A.,
Strunin V. P.,
Ushakova M. A.,
Samoilova R. I.,
Panfilov V. N.
Publication year - 1996
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221930103
Subject(s) - paramagnetism , hydrogen , analytical chemistry (journal) , silane , thermal decomposition , infrared spectroscopy , aerosol , spectroscopy , chemistry , decomposition , materials science , organic chemistry , condensed matter physics , physics , quantum mechanics
Hydrogen and paramagnetic centers contained in aSi:H aerosol particles, formed during thermal decomposition of silane are studied. The methods of IR spectroscopy, effusion of hydrogen, and ESR spectroscopy are used. For low temperatures of aerosol formation (T ≦ 833 K) paramagnetic centers with g ∼ 2.0051 are recorded in aerosol particles. For high temperatures (T > 880 K) paramagnetic centers with g ∼ 2.0055 are recorded. The obtained experimental results testify that the existence of paramagnetic centers with g ∼ 2.0051 is related to the presence of polysilane chains. The existence of paramagnetic centers with g ∼ 2.0055 is related to the presence of monohydride groups with the frequency of stretching vibrations near 2100cm −1 located on the surface of interconnected microvoids and microchannels. The quantitative relations between the fractions of hydrogen present in various structural groups and IR absorptions in the corresponding regions of the IR spectra are obtained.