Reading Review Notes for Week 10:

• Re-read the notes from last class. 

-What does the Fermi energy of a metal represent?  What do you need to know to calculate it.

• Things to think about

-How are the Fermi energy and free electron concentration in a metal related?  What happens to the Fermi energy if you use metals with different densities and number of valence electrons?

• Read sections 5.1

 -Explain why Si tetrahedrally bonds.

-What is electron affinity?

-Describe how a hole is created using photon energy or thermal generation.

-What is recombination?

-Review the derivation of mobility from Chapter 2.

-What is effective mass?

-What are N_C and N_V?

-What is n_i?

-Review the derivation of why E_F is in the middle of the bandgap for an intrinsic semiconductor.

• Important terms you should know

  -electron affinity

  -band gap energy

  -conduction band

  -valence band

  -tetrahedra

  -thermal generation

  -electron and hole mobilities

  -compensation