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What is the charge on P type Semiconductor intially ?? and Why

What is the charge on P type Semiconductor intially ??


and Why


 

Grade:Upto college level

1 Answers

Ashish Kumar
askIITians Faculty 32 Points
7 years ago

In any extrinsic semiconductor whether P or N type the the total charge is zero , ie, it electrically neutral.Suppose in case of p-type semiconductor in  which Si  is doped with Boron(which has 3 valence electrons).Both Si and B are electrically neutral to begin with.

When bonds are formed between them Becuase of 1 electron being less than 4 of Si there is excess of holes in the material for conduction.But there is also on electron of Si for every hole of B.So totally the P-type is electrically neutral

 

 

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