Semiconductors, number density of charge carriers.

[elevenb]

Homework Statement

It's the third part which I'm stuck on.

Homework Equations

The Attempt at a Solution

I've substituted in all the numbers and, multiplied by the density but I am still not getting the correct answer; where a I going wrong?

I got

6.13*(10^11) m^-3

The answer given is

1.6*(10^12) m^-3

 

[mfb]

"Third part" means the undoped silicon?

I've substituted in all the numbers and, multiplied by the density but I am still not getting the correct answer; where a I going wrong?

There is no way to tell if you just show your answer instead of the actual work.
What did you use as room temperature?

 

[elevenb]

"Third part" means the undoped silicon?
There is no way to tell if you just show your answer instead of the actual work.
What did you use as room temperature?

I took 298K as room temperature; and yes sorry I meant the part with the undoped silicon.

 

[mfb]

That is the number of electrons. You also have holes as charge carriers.

I get the given answer as rounded result with 300K instead of 298K.

 

[elevenb]

That is the number of electrons. You also have holes as charge carriers.

I get the given answer as rounded result with 300K instead of 298K.

Ahh the holes! I completely forgot, kicking myself now! Thank you!