44 PN Junction Diode Formation | Depletion Region & Barrier Potential Explained

How is a PN Junction Diode formed? ⚛️

In this video, we visualize the physics behind the most important structure in electronics.
1. *The Contact:* What happens when P-type meets N-type?
2. *Diffusion:* Why holes and electrons rush across the junction.
3. *Depletion Region:* How immobile ions form a "Barrier Wall".
4. *Barrier Potential ($V_{bi}$):* Why Silicon is 0.7V and Germanium is 0.3V.



[Image of PN junction depletion region formation]


This is the foundation for BJT, FET, and MOSFET. Essential for EDC and Analog Electronics.

#PNJunction #Semiconductors #Physics #EDC #Engineering #GATE2025 #tutorial

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