PN Junction Introduction

/ edmundsj
If you want to see more of these videos, or would like to say thanks for this one, the best way you can do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
In this video I introduce the P/N junction: the most fundamental device on which all of modern electronics is built. I explain what happens when you put together a piece of N and P-type material, and why the resultant depletion region is formed.
This is part of my series on semiconductor physics (often called Electronics 1 at university). This is based on the book Semiconductor Physics and Devices by Donald Neamen, as well as the EECS 170A/174 courses taught at UC Irvine.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.

[@Mido-gi1gw]

So in Summary, In a pn junction, there are four types of charges, movable and unmovable postive and negative charges. The movable postive charges are located in the p-type and the movable negative charges are located in the n-type. Both types are neutral though due to the existence of the opposing unmovable charges. When the p-type and n-type come in contact with each other, some of the movable opposite charges migrates to the opposite type. As they are traveling, they are repelled by the other migrating movable opposite charges, such that the opposite movable charges migrates at the extreme side of each type. The repulsive field created by the moveable charges contains only the unmovable opposite charges, which are constructs the depletion region. In conclusion, the pn-junction consists of 3 regions, the postive region, the depletion region and the negative region.

[@somawesome]

I wish I found these videos earlier.

[@emanueltraiger6092]

Some Feynmanish quality of explanation right here

[@benwhitney4549]

I'm sorry for such a repetitive comment, but I need to say: thank you for your videos. They are fantastic and explained so well. I'm using them to help me in my college class. My professor is amazing but getting two different, well stated explanations is vital for my learning process.

[@omarmustafa8118]

This is basically the best explanation on the internet.

[@suleyman_ct]

Proper accent deserve a hug.

[@MinuteMayne]

I think it's essential to explain why the holes and electrons move in the first place: diffusion by chemical potential gradients.

[@GradientSoln-En]

It was this simple????

[@xAmiSarahx]

I like it....

[@barneycasting8331]

I was in an interview panel where we interviewed Jordan Edmunds for a position, now I am watching his videos to teach my students! 😂😂😂

[@sujoypaul1874]

I am whole heartedly thankful to you for these simple videos,so ordinary students can understand complex topics

[@zworm99]

I just have to say this whole semiconductor physics series is fantastic! I´m a physics engineer student from Sweden currently taking a course in solar cells and unfortunately our textbook is lackluster to say the least and our teacher not too pedagogical (not to mention hard to reach due to the current pandemic). Your videos really helps with the intuitive understanding of the subject and they make me even more excited to become a great physicist! Thank you!

[@stef-e6y]

I have my renewable energy exam soon, this really helped me out with PV systems!!! Thank you

[@katieruland6851]

EE masters student and have taken probs 8 classes between now and undergrad where the depletion region of pn junctions/devices is discussed and I've never seen a good explanation and this is great.

[@lichifang632]

I was completely confused by my lecturer until I watched your video. Thank you so much!!!

[@kavidiss7959]

Honestly the best explanation. I was dying to find one😭 thank u soooo much.

[@shuvamoy_uchiha_itachi07]

After 7 years understanding it in a wholesome manner. Thanks for the beautiful explanation ❤️

[@sharvani6133]

The explanation is so clear. Thanks!

[@tomfa6507]

I wish my professors from the past could explain things like you do, you should become a college professor if you aren't already!!

[@fugosloyalty2560]

took me a while, but finally clear w the concept! thanks a ton !