What Causes Electrons to Jump into Holes?

[Karthikeyan]

Hi all,
What causes the electrons to jump into holes??

Thanks,
Karthikeyan.K

 

[ZapperZ]

Hi all,
I have a basic doubt. We say holes are positively charged. Is there any experiment which says that holes are positive ?? or is that only because it attracts electrons we call it positively charged?

Thanks...
Karthikeyan.K

Look at the Hall effect in an n-type semiconductor and a p-type semiconductor.

Zz.

 

[daniel_i_l]

Because of the uncertainty principle there's always a probability that the electron will change it's state. so if we take a set of base states where each state x corresponds to the electron being at atom x then if atom x has a "hole" (missing an atom) there's always a non zero probability that an electron in the state x-1 will go into state "x" and then the hole will have moved to the left. (the same thing applys to electrons at other atoms)