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Sunday, May 31, 2015

#326 Charge carrier scattering depends on material

Even more significantly than the crystallographic defects (see blog #324 and #325) the very nature of interatomic bonding will affect scattering of charge carriers, and hence, their mobility in any given material.


For instance, in the case of inorganic covalently-bonded semiconductors charge carriers are moving with an electric filed as highly delocalized plane waves in wide bands and a  high electron mobility in the range ~103 cm2V-1s-1results. In the case of organic semiconductors featuring very weak intermolecular forces, electrons are hopping between localized states and are subject to scattering at every stop. The resulting electron mobility is in the range of the mere ~1 cm2V-1s-1.

Posted by Jerzy Ruzyllo at 10:11 AM | Semiconductors | Link is the personal blog of Jerzy Ruzyllo. With over 35 years of experience in academic research and teaching in the area of semiconductor engineering (currently holding position of a Distinguished Professor of Electrical Engineering and Professor of Materials Science and Engineering at Penn State University), he has a unique perspective on the developments in this progress driving technical domain and enjoys blogging about it.

With over 2000 terms defined and explained, Semiconductor Glossary is the most complete reference in the field of semiconductors on the market today.

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