Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−2 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in this Si crystal?

Answer 1

Can't get it right as well. Can aoneone provide some info ? This looks easy but i think my numbers are wrong

Answer 2

Use the Method used in H4P2.

Answer 3

As its Si: 5.00*10^22 / (gallium level*10^-2)

so for you: 1.5455*10^19

Answer 4

Thank you someguy

Answer 5

Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−5 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in this Si crystal?

Answer 6

What is the formula? please

Answer 7

CHEAT!

Do NOT help this person. They are trying to cheat in a midterm exam.