Midterm• 8:00 am, Friday, Feb. 27, room to be announced.• You may bring one 8.5x11 sheet with notes on both

sides.• Exam will cover the homework.• One short answer question (or equivalent) expected –

could go beyond homework problems.• Wave-particle duality, properties of solutions of the time-

independent Schrodinger equation, k-space and real space band diagrams, direct and indirect gap semiconductors, Fermi function (probability of occupation of states), density of states, carrier concentration, mobility, conductivity, recombination, generation, diode electrostatics (Vbi, W), diode I-V characteristics.

w=(2εV/qNB)1/2

Slope?

A

Ohmic contact: What is it?How do you make one?

What Next?

• Heterojunctions

• Nanotubes

• Solar Cells, Photodetectors, LEDs and lasers.

• MOSFET

• BJT