What is the relation of fermilevel and bias voltage?
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Fermi level is the highest energy state occupied by electrons in a material at absolute zero temperature. As the temperature is increased, electrons start to exist in higher energy states too. ... Fermi level is also defined as the work done to add an electron to the system.
Bias is direct current ( DC ) deliberately made to flow, or DC voltage deliberately applied, between two points for the purpose of controlling a circuit . In a bipolar transistor , the bias is usually specified as the direction in which DC from a battery or power supply flows between the emitter and the base.
https://inst.eecs.berkeley.edu/~ee105/sp04/handouts/lectures/Lecture19.pdf
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