The PN Junction. How Diodes Work? (English version) 

+thescottguy Wow, thanks a lot!

+fmgomezcampos it's true

+thescottguy Although I do find the voice somewhat annoying (no offense) :/

jjjcuxzuf

A simple analogy is if you have a pipe full of water with a small bubble, it is much easier to think of the bubble as moving through the water. But if we have an empty pipe with a drop of water, it is much easier to think of the drop of water as moving through the air bubble. Mathematically, whether you treat the holes as charge carriers or the electrons as charge carriers in a specific energy band you get the same answer, however it is much easier to deal with a lesser amount of stuff. Hope that clears up the convention for you!

sure bro? i can make a magic diodos

Tyy

One question. Why is it correct to visualize a current making the barrier higher or lower instead of visualizing it as increasing or decreasing the "pressure" of the electrons trying to flow "uphill?"

Gabe Hopper Hm, interesting question. Every analogy breaks down, and I think the 'uphill' analogy does here. The application of an external voltage increases the difference in electrical potential energy between n and p, providing the electrons with more energy so they can overcome the opposing difference in electrical potential induced by the dopants' relative charges. However, as the electrons overcome this barrier and begin flowing, the opposing dopant-induced voltage will consequently lower - and as this opposing voltage lowers, the electrons flow more readily. It's a feedback loop that reaches an equilibrium. These events happen so quickly that considering either the barrier being lowered or the electrons being given more energy as the initiator is of negligible difference, but perhaps it's more technically correct to think of the electrons as gaining more energy THEN the barrier lowers, and then the feedback continues until an equilibrium is reached.

is that true??

haha yeah the voice is bizarre. It is human but as robotic a possible. there is a bit at 4.13 when she say "this is a peculiar behaviour" and it sounds like a robot breaking its programming and forcing human-like emotions. good video though!

andy b No dude

DNA Militar haha! How much of a dick do i feel like haha!

It sound like the woman from richard dawkins "selfish gene" audio book .. way too close

Minds Forge Hi! Thanks a lot for the support! Nevertheless, sometime the haters do their job suggesting new ideas for future videos (they could be more polite sometimes though) ;-) We have one on transistors and about LEDs, check it out in my channel! I hope you like them. Thanks!

You ruined this video for me now! :D