Thermopower and conductivity activation energies in hydrogenated amorphous silicon

H. Dyalsingh, J. Kakalios

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Measurements of the dark conductivity activation energy are compared to that of the thermoelectric effect measured in both open-circuit and short-circuit conditions for doped hydrogenated amorphous silicon. The activation energy of the thermopower is much less than that obtained from the conductance measurements. However, the short-circuit Seebeck-current activation energy agrees exactly with the conductivity activation energy, consistent with the difference in activation energies between conductivity and thermopower arising from long-ranged disorder at the mobility edges.

Original languageEnglish (US)
Pages (from-to)7630-7633
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number11
StatePublished - 1996

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