Publication Date:
2015-04-21
Description:
The electronic structure of polymer-derived amorphous silicon carbide pyrolyzed at different temperatures was investigated by combining measurements of their temperature-dependent conductivity and optical absorption. By comparing the experimental results with theoretical models, the parameters such as conduction band, band-tail, defect energy, and Fermi energy were determined. The results revealed that band gap and band-tail width decreased with increasing pyrolysis temperature. Furthermore, it was found that electrons transport followed a band-tail hopping mechanism, rather than variable range hopping. These results were discussed in accordance with the microstructural evolutions of the material.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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