Calculating the effective mass

1. May 2, 2015

rwooduk

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
I understand you can calculate the effective mass by using the equation above. What I'm unsure about is the "calculate the effective mass of the carriers" part. A donor impurity would be near the conduction band, therefore do we simply use the equation for Ec in the question? A bit unsure.

2. May 2, 2015

Staff: Mentor

I would expect that, but I'm not sure.