22
votes
Doesn't counting hole and electron current lead to double-counting of actual current?
Your mistake here is the assumption that both electron and hole are counted in the same band. If this assumption were correct, then indeed, we'd have counted the carriers twice.
But actually, electron ...
- 29.4k
14
votes
Doesn't counting hole and electron current lead to double-counting of actual current?
Current is measured through a surface. If, in one unit time, a free electron passes through the surface and then recombines with a hole, the current is one unit charge per unit time. If, in one unit ...
- 3,092
2
votes
Doesn't counting hole and electron current lead to double-counting of actual current?
A simple way is to think of a moving hole as electrons filling the vacancy. Then we actually have two electrons moving - the one that previously occupied the hole (but is now in the conduction band), ...
- 61.8k
2
votes
Semiconductors and LEDs
Why the led is emitting a finite bandwith light centred at red wavelength even though it has "only one band gap"?
IMHO, it is not quite clear what exactly the OP finds suprising here:
that ...
- 61.8k
1
vote
Doesn't counting hole and electron current lead to double-counting of actual current?
If we were to count both hole current and electron current, one would say that one electron moved from left to right and also that one hole moved from right to left, which leads to actually count two ...
- 105k
1
vote
Excitons and Photoluminescence (PL)
Lower binding energy for an exciton means that the luminescence frequency is close to that of the band gap. This means that lesser energy is needed for the exciton to be destroyed via interaction with ...
- 61.8k
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