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Analog Electronics
INTRODUCTION TO SEMICONDUCTORS
TYPES OF MATERIAL & their COMPARISON
TEMPERATURE EFFECT ON MATERIALS
ATOMIC STRUCTURE OF SEMICONDUCTORS
P-TYPE SEMICONDUCTOR
N-TYPE SEMICONDUCTOR
MASS ACTION LAW
DIODES
MAKING OF DIODE
DIFFERENT FORCES ACTING ON CHARGE CARRIERS
DEPLETION WIDTH VARIATION with DOPING
CONNECTING BOTH ENDS OF DIODE
FORWARD BIASING DIODE
TRANSISTOR

 

 

MASS ACTION LAW:

This law states the relation between concentrations of minority and majority carriers at a constant temperature. It states that product of concentration of majority and minority carrier is constant at fixed temperature. According to the law

                                n * p = ni2 at constant temperature

  • ni2 is the intrinsic concentration given by   and is constant at a temperature
  • n is the concentration of electrons and p is the concentration of holes. So in p-type material, p is concentration of majority carriers and n is concentration of minority carriers. Similarly in n-type, n is concentration of majority carriers and p is concentration of minority carriers.

According to the law, if we increase the doping level of the material i.e. concentration of majority carriers, then concentration of minority carriers would decrease.

 

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