How to Calculate the Effective Mass of Carriers?

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To calculate the effective mass of carriers, the appropriate equation involves the conduction band energy (Ec) when considering donor impurities. The discussion highlights uncertainty about applying the equation specifically for effective mass in this context. It emphasizes the need to clarify how donor impurities influence the calculation. Understanding the relationship between carrier concentration and effective mass is crucial. The effective mass can be determined using the relevant equations, but careful consideration of the context is necessary.
rwooduk
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Homework Statement


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Homework Equations


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