How can I calculate the number of dopants (atoms/cm^3) from a

Thread starter fk08
Start date Jun 20, 2011

In summary, to calculate the number of dopants (atoms/cm^3) from a given concentration (mol/cm^3), you need to convert the concentration to atoms/cm^3 by multiplying it with Avogadro's number. The atomic weight of the dopant element cannot be used for this calculation. The density of the material does not affect the calculation, but it can be used to calculate the weight of the dopants. It is not possible to calculate the number of dopants without knowing the concentration of the material. The accuracy of the calculation depends on the accuracy of the input values.

Jun 20, 2011

fk08

How can I calculate the number of dopants (atoms/cm^3) from a resistance, e.g. R = 50 ohm*cm?

Cheers!

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Jun 21, 2011

Mapes

Science Advisor

Homework Helper

Gold Member

Try Googling "dopant density vs. resistivity". There are plenty of tools out there.

1. How do I calculate the number of dopants (atoms/cm^3) from a given concentration (mol/cm^3)?

To calculate the number of dopants, you need to first convert the concentration from mol/cm^3 to atoms/cm^3 by multiplying it with Avogadro's number (6.022 x 10^23 atoms/mol). This will give you the number of atoms per cubic centimeter.

2. Can I use the atomic weight of the dopant element to calculate the number of dopants?

No, you cannot use the atomic weight of the dopant element to calculate the number of dopants. Atomic weight is the average mass of all the isotopes of an element, whereas the number of dopants refers to the number of individual atoms present.

3. How does the density of the material affect the calculation of dopants?

The density of the material does not affect the calculation of dopants. The number of dopants is solely dependent on the concentration and the volume of the material. Density only affects the mass of the material, which can be used to calculate the weight of the dopants.

4. Is it possible to calculate the number of dopants without knowing the concentration of the material?

No, it is not possible to calculate the number of dopants without knowing the concentration of the material. The concentration is a crucial factor in determining the number of dopants present in a given volume of material.

5. How accurate are the calculations for determining the number of dopants?

The accuracy of the calculations for determining the number of dopants depends on the accuracy of the input values, such as the concentration and volume of the material. It is important to use precise and accurate measurements to obtain a more accurate result.