NDLI: EPR investigation of a-Si:H aerosol particles formed under silane thermal decomposition

Content Provider	Springer Nature Link
Author	Onischuk, A. A. Samoilova, R. I. Strunin, V. P. Cheskov, E. N. Musin, R. N. Bashurova, V. S. Maryasov, A. G. Panfilov, V. N.
Copyright Year	1998
Abstract	The dangling bond defects were investigated in a-Si:H particles formed under silane thermal decomposition in flow reactor. EPR together with hydrogen evolution method were used. The experimental results allowed us to conclude that there are two kinds of dangling bond defects in a-Si:H aerosol particles. The defects of the first kind are localized on the surface of interconnected microvoids and microchannels (surface dangling bonds) and those of the second kind are embedded in amorphous silicon network (volume dangling bonds). The thermal equilibration of dangling bonds and temperature dependence of equilibrium dangling bond concentration were investigated. It was found that at temperatures > 400 K the dangling bond concentrationNApplied Magnetic Resonance s reversibly depends on sample temperature. The volume dangling bond concentration increases with temperature increasing (the effective activation energy of dangling bond formationU > 0), and the surface dangling bond concentration decreases with temperature increasing (U < 0). It has been found that EPR line is considerably asymmetric for samples with high hydrogen content and for low hydrogen content the EPR line is weakly asymmetric. A conclusion was drawn that the asymmetry degree depends on amorphous silicon lattice distortions. This conclusion has been confirmed by EPR spectra simulations.
Starting Page	59
Ending Page	94
Page Count	36
File Format	PDF
ISSN	09379347
Journal	Applied Magnetic Resonance
Volume Number	15
Issue Number	1
e-ISSN	16137507
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solid State Physics Spectroscopy/Spectrometry Physical Chemistry Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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