What Causes the Forbidden Gap in Semiconductors?

[Arthur202]

Can anybody explain my what is the origin of this forbidden gap?

I mean how it was created and what is the physics behind this issue?

 

[Dr. Courtney]

https://en.wikipedia.org/wiki/Band_gap

 

[Arthur202]

https://en.wikipedia.org/wiki/Band_gap

There isn't a real explanation there for the phenomenon as I have asked. i didn't ask what is it.

 

[Arthur202]

I am also looking for a good explanations for bloch functions and beriluen zone..why we have it and what is the meaning...

And the last issue I am interested in what are the determination rules in quantum dots ( I mean spectroscopic rules)?

 

[Dr. Courtney]

There isn't a real explanation there for the phenomenon as I have asked. i didn't ask what is it.

The band gap exists because there are no solutions to the Schrödinger equation for that range of energies.