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Temperature Dependence of a Hydrogen Doublet Site in Light-Soaked a-Si:H From 1H NMR

Published online by Cambridge University Press:  01 February 2011

T. Su ,
P. C. Taylor ,
G. Ganguly  and
D. E. Carlson
T. Su
Affiliation:
Department of Physics, University of Utah Salt Lake City, UT 84112, U.S.A.
P. C. Taylor
Affiliation:
Department of Physics, University of Utah Salt Lake City, UT 84112, U.S.A.
G. Ganguly
Affiliation:
BP Solar Toano, VA 23168, U.S.A.
D. E. Carlson
Affiliation:
BP Solar Toano, VA 23168, U.S.A.
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Abstract

We investigate the temperature dependence of an additional 1H NMR signal that appears in aSi:H at T = 7 K only after light soaking. This “doublet” signal is attributed to a pair of hydrogen atoms approximately 2.3 Å apart. We present the first lineshape of this doublet, and we examine the spin-lattice relaxation from 6.5 K to 20 K at a magnetic field of about 3.5 T. At low temperatures, the spin-lattice relaxation time of these paired hydrogen sites has a strong dependence on temperature, which is probably the result of some form of local motion.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 762: Symposium A – Amorphous and Nanocrystalline Silicon-Based Films – 2003 , 2003 , A12.4
Copyright
Copyright © Materials Research Society 2003

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