What is the electron concentration in a p-doped semiconductor?

In summary, a semiconductor material with an intrinsic carrier concentration of 5.6 x 10^14 m^-3 at 300K becomes p-doped with an acceptor concentration of Na = 3.9 x 10^18 m^-3. The value of the energy band gap (Eg) is not needed, as a simple equation can be used to calculate the electron concentration in this scenario.
  • #1
peanutbutter
8
0
A semiconductor material has an intrinsic carrier concentration of 5.6 x 10^14 m^-3 at 300K.
What is the electron concentration when such a semiconductor is p doped with an acceptor concentration Na = 3.9 x 10^18 m-3.

I have no idea how to approach this question without a value for the energy band gap. Could someone point me in the right direction? Thanks.
 
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  • #2
Why do you need the value of Eg for this question? You only need a simple equation for this question.
 
  • #3
Defennder said:
Why do you need the value of Eg for this question? You only need a simple equation for this question.

Thanks for the boost in confidence, I've worked it out now anyway.
 

1. What are intrinsic semiconductors?

Intrinsic semiconductors are materials that have a balanced number of positively charged holes and negatively charged electrons. This balance allows them to conduct electricity under certain conditions.

2. How do intrinsic semiconductors differ from extrinsic semiconductors?

Intrinsic semiconductors have a balanced number of charge carriers, while extrinsic semiconductors have intentionally introduced impurities that create an excess of either electrons or holes.

3. What is the band gap of an intrinsic semiconductor?

The band gap of an intrinsic semiconductor is the energy difference between the valence band (where electrons are bound to atoms) and the conduction band (where electrons are free to move and conduct electricity).

4. How do temperature and impurities affect the conductivity of intrinsic semiconductors?

Increasing temperature can cause more electrons to break free from their bound states and contribute to conductivity in intrinsic semiconductors. The presence of impurities can also create extra charge carriers and increase conductivity.

5. What are some common examples of intrinsic semiconductors?

Some common examples of intrinsic semiconductors include silicon, germanium, and diamond. These materials are often used in electronic devices such as transistors and diodes.

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