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Hydrogen Passivation of Doped and Undoped Microcrystalline Silicon
Published online by Cambridge University Press: 21 February 2011
Abstract
The effect of hydrogen plasma treatment on the properties of undoped and doped microcrystalline silicon are investigated by Raman and infrared spectroscopy, conductivity measurements, hydrogen effusion, and subgap absorption. It is found that hydrogen causes a passivation of dopant atoms similar to that seen in crystalline silicon. However, the efficiency of the dopant passivation appears to be smaller in μc-Si, and the vibrational spectra of dopants and hydrogen show distinct broadening due to local disorder. It is suggested that intergrain regions may efficiently getter atomic hydrogen introduced from the plasma and also provide the origin for a weakly bound hydrogen phase observed in the effusion experiments.
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- Copyright © Materials Research Society 1990
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