How will you dope a pure silicon crystal to obtain a p type and an n type semiconductor

p-type and n-type semiconductors .

Bond in n and p type semiconductor is

Bond in n and p-type semiconductor is

Atoms of phosphorus aresnic indium and bismuth are used for doping pure semicondluctors to produce p type or n type semiconductors p tyhpe semocnductor

A pure semiconductor germanium or silicon, free of every impurity is called intrinsic semiconductor. A room temperature, a pure semiconductor has a very small number of current carriers (electrons and holes). Hence, its conductivity is low. When the impurity atoms of valence five or three are doped in a pure semiconductor, we get repectively n-type ot p-type extrinsic semiconductor. In case of a doped semiconductor. n_(e)n_(h)=n_(i)^(2) , where n_(e) and n_(h) are the number density of electrons and holes respectively and n_(i) is the number density of intrinsic charge carriers in a pure semiconductor. The conductivity of extrinsic semiconductor is much higher than that of intrinsic semiconductor. (i) Name two materials to be doped in pure semiconductor of silicon to get p-type semiconductor n-type semiconductor. (ii) What do you learn from the above study?

The impurity atoms with which pure silicon should be doped to make a p-type semiconductors are those of

impurity atoms with which pure silicon should be doped to make a p - type semiconductor are those of