Physics – Condensed Matter – Materials Science
Scientific paper
2007-02-16
Physics
Condensed Matter
Materials Science
10 pages, 4 figures, changed content and corrected typos
Scientific paper
10.1103/PhysRevB.77.045212
The electrical conductivity behavior of highly crystallized undoped hydrogenated microcrystalline silicon films having different microstructures was studied. The dark conductivity is seen to follow Meyer Neldel rule (MNR) in some films and anti MNR in others, depending on the details of microstructural attributes and corresponding changes in the effective density of states distributions. A band tail transport and statistical shift of Fermi level are used to explain the origin of MNR as well as anti-MNR in our samples. We present the evidence of anti-MNR in the various experimental transport data of microcrystalline silicon materials reported in literature and analyze these data together with ours to show the consistency and physical plausibility of statistical shift model. The calculated MNR parameters and other significant material parameters derived therefrom are tenable for a wide microstructural range of the microcrystalline silicon system.
Cabarrocas Roca P. i.
Kumar Satyendra
Ram Sanjay K.
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