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Semiconductors

How Does a Transistor Work? Excellent introduction to semiconductors. YouTube 6 minutes from Veritasium 5 Star
How transistors work link This one is from TED-Ed. YouTube 5 minutes 4 Star
       
    All the animations below from absorblearning may only work with Internet Explorer  
Normal Silicon lattice (undoped)
Diagram from absorblearning.com
4 Star
Silicon doped with Phosporus
Diagram from absorblearning.com
4 Star
Silicon doped with Boron
Diagram from absorblearning.com
4 Star
How a depletion layer is formed Simple simulation from absorblearning.com
4 Star
Diode in forward bias
Simple circuit plus development of graph from absorblearning.com
4 Star
Graph for a semiconductor diode
Diagram from absorblearning.com
4 Star
 
   
How the first transistor worked Link YouTube 5 minutes via engineer guy  
Video introduction to formation of PN junction YouTube 4 minutes. 3 Star
How a smoke detector works YouTube 4 minutes. Involves radioactivity and semiconductors 4 Star
 
   
Using diodes as polarity indicators MyYouTube. 3 mins  
Electron Band Structure In Germanium, My Ass
Student's report of an experiment which didn't quite go to plan. Very, very funny
5 Star
History of 50 years of the LED. 4 mins audio file. bbc.co.uk 3 Star
Making LED Street Art From HardScience on Youtube 3 Star
 
   
Britney Spears' Semiconductors website
Not many people know that Britney Spears has a degree in Physics, but gave up this glamorous lifestyle for music!
3 Star
       
To investigate the variation of current with potential difference for a semiconductor diode MyYouTube. 9 mins  
  link From mathsphysics.com 4 Star
  link YouTube video from c4science 4 Star
Variation of the resistance of a themistor with temperature From mathsphysics.com 4 Star
  link YouTube video from c4science 4 Star