2 I2I questions (1 Viewer)

[Charlesr]

Hello

Strangely I cant find a good explanation to either these questions in any of my textbooks, CSU, etc.

1) Drawing p and n type semiconductor band structure. Sure i can do the stanard smaller gap than insulator but what is the diff between n and p structure?

2) A clear explanation of how solar cell works. I understand photoelectric effect, i would just say photoelectric effect > liberates electrons > attracted to p type cous of holes > current flows > hot water

Love an explanation or web address
Cheers

 

[obimoshman1234]

for number one difference occurs within the void area.

http://hyperphysics.phy-astr.gsu.edu/hbase/Solids/dope.html

scroll down it just means

for n type they gain essentially another level to accept electrons

for p type another level to accept holes

 

[Charlesr]

Legend

Thanks alot

 

[minijumbuk]

Photoelectric effect liberates electrons from the n-type semiconductor layer and it flows to the p-type and into an external circuit, and back to the n-type layer. The flow of electrons means a conventional current is made in the other direction.