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Basic Electronics by Kamakhya Prasad Ghatak, Debashis De

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1-6 ELECTRICAL CONDUCTION PHENOMENON

The concepts of mobility and scattering are basic ingredients of the electrical conduction phenomena in electronic materials and these are discussed in the following sections.

1-6-1 Mobility

Mobility is the essential property that characterizes the carrier transport. The carrier mobility (μ) also plays a key role in characterizing the transport co-efficient in semiconductor devices. The mobility is defined as the drift velocity (v0) per unit electric field, and can be written as:

 

C01E078

 

where, E0 is the applied electric field.

Relationship to scattering

The force generated on a carrier of charge e due to the ...

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