Chapter 2
Electron Transport and Device Physics
2.1 Semiconductors and Carriers
2.1.1 Strategy for the Calculation of Carrier Concentration
In a semiconductor, it is important to calculate the concentration of carriers in the conduction and valence bands. The number of carriers per unit volume (1 cm3) is huge and we only know the occupation probability of states with a given energy. In this case, we need to calculate the number of states for a given energy first, multiply it with the occupation probability, and then add all of the products.
To understand such a procedure clearly, let us consider a method of counting the total number of people in a building. We know the occupation probability of a room and it depends on which floor the room is ...
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