doubt in basics of doping

[abishek]

when an intinsic semiconductor is doped.......the no of holes/electrons increase....but the material is still neutral.....is it because of the ions formed( donors becoming + bcos they lose e and acceptors - bcos they accept an electron??)....

when a donor loses an electron is a hole formed or only a immoblie ion???

also with usual notations....y is n.p = n_i^2......is i bcos of the fermi dirac distribuiton??

 

[Hughes]

when an intinsic semiconductor is doped.......the no of holes/electrons increase....but the material is still neutral.....is it because of the ions formed( donors becoming + bcos they lose e and acceptors - bcos they accept an electron??)....

Yes, you are right.

when a donor loses an electron is a hole formed or only a immoblie ion???

A donor losing an electron becomes an immobile ion.

 

[neils_arm_strong]

when ion looses electron(ie the donor ion looses electron) holes are not formed.Holes are formed only when elctrons in the semiconductor lattice are removed(either by acceptors or driven by a field).

 

[japholix]

when ion looses electron(ie the donor ion looses electron) holes are not formed.Holes are formed only when elctrons in the semiconductor lattice are removed(either by acceptors or driven by a field).

And on the other hand, these ions become scattering centers

 

[yjkwon57]

Hi~~

I think the number of the ionized impurity atoms (whether + or -) is equal to the number of charge carriers (whether - or +).