P-type vs n-type (1 Viewer)

[Drsoccerball]

1) Which one has a higher conductivity? Wouldn't it be n-type due to the extra electron ?

 

[dan964]

maybe, but then again the hole would have the exact same charge but positive as the negative electron
in other words, i have no clue

 

[Mr_Kap]

1) Which one has a higher conductivity? Wouldn't it be n-type due to the extra electron ?

Wouldn't they both be the same because the hole has exactly opposite charge.

 

[mrpotatoed]

For the intents and purposes of the HSC I would assume them to be equal.

 

[Drsoccerball]

For the intents and purposes of the HSC I would assume them to be equal.

But the Hsc dot point is :
"Describe how 'doping' a semiconductor can change its electrical properties"
Furthermore i saw a question a while ago asking a similar question about which doping does what.

 

[keepLooking]

You just explain how an extrinsic semiconductor is formed. G3/G5 element and their respective way of conducting? (positive holes or spare electrons). I haven't seen a question asking to compare the conductivity of each yet.

 

[Drsoccerball]

You just explain how an extrinsic semiconductor is formed. G3/G5 element and their respective way of conducting? (positive holes or spare electrons). I haven't seen a question asking to compare the conductivity of each yet.

Dont make me go searching...

 

[mrpotatoed]

For that dot point you just describe how having either an extra electron or hole in the lattice increase the conductivity by adding an impurity layer and hence reducing the band gap. Never seen anything about comparing the conductivity of holes against electrons.

 

[TalkTakesTime]

N-type doped semiconductors are better conductors than p-type doped semiconductors. As you know the main charge carrier of n-type is free moving electrons in the conduction band (once a voltage is applied) while for p-type it's positive 'holes' (valence electron deficiency). Holes are less mobile since valence electrons are more tightly bound to the nucleus than conduction electrons (hence they're beneath the conduction band in energy band diagrams) so positive hole 'current' from atom to atom is less than electron current through overlapping conduction bands.

 

[Drsoccerball]

N-type doped semiconductors are better conductors than p-type doped semiconductors. As you know the main charge carrier of n-type is free moving electrons in the conduction band (once a voltage is applied) while for p-type it's positive 'holes' (valence electron deficiency). Holes are less mobile since valence electrons are more tightly bound to the nucleus than conduction electrons (hence they're beneath the conduction band in energy band diagrams) so positive hole 'current' from atom to atom is less than electron current through overlapping conduction bands.

The sample answer was similar to this it was n-type

 

[TalkTakesTime]

Glad I could help