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Midterm

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The midterm exam is scheduled for Friday, February 27, at 8:00 AM, with the room to be announced. Students may bring one 8.5x11 sheet of notes, written on both sides. The exam will encompass all homework material and one short answer question, which may extend beyond the homework problems. Key topics include wave-particle duality, solutions of the time-independent Schrödinger equation, k-space and real-space band diagrams, semiconductor theories, Fermi function, and characteristics of diodes, transistors, and nanotechnology applications such as solar cells and LEDs.

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Midterm

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  1. 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.

  2. w=(2εV/qNB)1/2

  3. Slope?

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

  5. What Next? • Heterojunctions • Nanotubes • Solar Cells, Photodetectors, LEDs and lasers. • MOSFET • BJT

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