Key Points
- To deterimine the number of carriers we integrate the number of electrons (holes) over energy
- Determine a density of states assuming a parabolic dispersion relationship
- Fermions! use fermi function for probability of state being filled
- n = p for intrinsic material
- Ef aprox. = Eg/2
Questions
- What is an extrinsic semiconductor and why?
- What is the mass action law? and when does it hold?
- Sketch the temperature dependance of n for a n-type semiconductor