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A Study of the Effects of Annealing and Outgassing on Hydrogenated Amorphous Silicon
Journal article   Peer reviewed

A Study of the Effects of Annealing and Outgassing on Hydrogenated Amorphous Silicon

P.J. Jennings, J.C.L. Cornish, B.W. Clare, G. Hefter and D.J. Santjojo
Thin Solid Films, Vol.310(1-2), pp.156-160
1997
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Abstract

Annealing and outgassing of thin films of hydrogenated amorphous silicon (a-Si:H) are shown to produce major structural changes in the material. Outgassing can occur in three stages with thresholds at 350°C, 450°C and 575°C corresponding to conversion of SiH3 groups to SiH2 and SiH; conversion of SiH2 groups to Si and SiH; and conversion of SiH to Si respectively. Heating to 575°C also appears to remove most of the hydrogen from vacancies and defects in the material. Such heat treatments could be useful for improving the stability of thin film a-Si:H devices.

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