Spectroscopy of Hydrogen-Related Defects

Vibrational Spectroscopy of Hydrogen-Related Defects in Silicon 

IR Studies of Lattice Defects Decorated with Hydrogen. 158 

The passivation of deep level defects and shallow impurities in semiconductors by hydrogen has been studied extensively in recent years (Pearton et al., 1987, 1989 Haller, 1989). For Si in most cases, complexing with hydrogen eliminates the electrical activity of a defect.Once passivated, the 

Copyright 1991 by Academic Press, Inc. All rights of reproduction in any form reserved. 

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M. Stavola and S. J. Pearton, Vibrational Spectroscopy of Hydrogen-Related Defects in Silicon... 

Local vibrational mode (LVM) spectroscopy is a tool suited to study this problem. The knowledge about LVMs supplies a detailed information about the physical properties of light impurities embedded in ZnO. The frequencies of the LVMs reveal directly the chemical binding of hydrogen with its neighbors due to the dependence on the atomic structure of the hydrogen-related defects. 

Great progress has been made toward understanding hydrogen-related complexes in semiconductors. Vibrational spectroscopy has played an important role in the determination of the structures and properties of these defects. Here, some of the unresolved questions discussed in this chapter are summarized. 

In principle LVM spectroscopy is not the only way to evidence the presence of hydrogen in bulk materials not intentionally doped with hydrogen. Shinar et al. (1986) attributed optically detected electron nuclear double resonance (ODENDOR) lines to hydrogen associated with a PGa antisite-related defect in GaP. However the identification of these ODENDOR lines is not unambiguous as it has been recently proposed that these lines could be P-related (Watkins, 1989). 

The present volume entitled Optical Absorption of Impurities and Defects in Semiconducting Crystals - Hydrogen-like Centres is by Dr. Bernard Pajot. He is an internationally recognized condensed matter experimenter. He has made numerous significant contributions to the field of donors and acceptors local vibrations of oxygen related complexes in Si and Ge and magneto-and piezo-spectroscopy of donors and acceptors. This volume contains an authoritative and clear presentation of the theory of donors and acceptors. The... 

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