A n-type and P-type silicon can be obtained by doping pure silicon with

Since  n-type semiconductor has electrons as majority charge carriers, thus for obtaining a n-type semiconductor silicon should be doped with electron rich donor elements of V A group like phosphorous, arsenic etc

And.p-type semiconductor has holes as majority charge carriers, thus for obtaining a p-type semiconductor we have to dope a pure silicon with acceptor elements of group III A like aluminum, boron, gallium, indium etc.