phyzguy said:Try reading this:
https://en.wikipedia.org/wiki/Electron_mobility
especially the section titled "Relation to conductivity".
Semiconductor n-type silicon is a type of silicon material that has been doped with impurities to create an excess of free electrons, giving it a negative charge. This makes it a good conductor of electricity.
N-type silicon is created through a process called doping, in which small amounts of impurities such as phosphorus or arsenic are added to pure silicon. These impurities have one more valence electron than silicon, creating an excess of free electrons in the material.
N-type silicon has a negative charge and is a good conductor of electricity. It also has a higher electron mobility than pure silicon, making it useful for electronic devices such as transistors and diodes.
The main difference between n-type silicon and p-type silicon is the type of impurities that are added during the doping process. N-type silicon has impurities with one more valence electron, while p-type silicon has impurities with one less valence electron. This creates an excess of free electrons in n-type silicon and a deficiency of electrons in p-type silicon.
N-type silicon is commonly used in electronic devices such as transistors, diodes, and solar cells. It is also used in integrated circuits and microchips, as well as in the production of LEDs and lasers.