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Effects of deposition conditions on transport properties of intrinsic hydrogenated amorphous silicon and hydrogenated amorphous silicon carbide films investigated by the photomixing technique
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22.It should be pointed out that the increase of the density of the negatively charged (midgap) defects and the decrease of the density of the positively charged (midgap) defects do not simply imply, due to the overall charge neutrality, that the ratio of mobile electron density to mobile hole density decreases, as charges can also be trapped in the shallow band tails.
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