All Questions
Tagged with electricity semiconductor-physics
6
questions
5
votes
2
answers
29k
views
How does current flow from the emitter, through the base and to the collector in a NPN transistor?
So, I understand that for a NPN transistor to work the emitter-base junction needs to be forward biased and the collector-base junction needs to be reverse biased. I understand how current flows from ...
- 59
6
votes
4
answers
447
views
PN junction: not sure to understand why reverse-biais lead to negligible current
My question is very highly related to Why doesn't current flow in reverse biased diode?
Basically, I would like to understand in more depth John Rennie answer. At $t=0$, I consider a PN junction ...
- 1,450
2
votes
2
answers
3k
views
Construction of Peltier tiles
I'm learning about the construction of Peltier tiles from Wikpedia. However, some of the statements in the article are not at all clear.
Here's the extract:
Two unique semiconductors, one n-type ...
user139621
2
votes
1
answer
78
views
Why don’t illuminated series connected (photo-)diodes bias each other?
When you connect, let's say, three photodiodes or solar cells, with a load, and you measure the voltage across the middle photodiode. Will the voltage change if
the adjacent cells are in the dark
if ...
0
votes
2
answers
159
views
Need an intermediate resistivity part/material
I need a part or material for a planned experiment (the experiment is similar to those described in my articles http://arxiv.org/abs/1208.0066 and http://arxiv.org/abs/1109.1626 ). The problem is that ...
- 27.1k
0
votes
1
answer
74
views
How do electrons exit LEDs? Aren't they in the valence energy state?
If a conducting electron reduces to the valence band in an LED, where does it get the energy to go back to the conductance band upon leaving the diode so current can flow?
I'm confused as to how ...
- 31