Question: 1. Derive the equation E, = E q? 4 2. Derive the equation (5) 47,n'n mq? 47 Enh 3. Using the Bohr model, find the

1. Derive the equation E, = E q? 4 2. Derive the equation (5) 47,n'n mq? 47 Enh 3. Using the Bohr model, find the first three energy levels for a Het ion, which consists of two protons in the nucleus with a single electron orbiting it. What are the radii and electron velocity of the first three orbits? 4. For each of the following semiconductors, sketch the energy band diagrams: a. Indium phosphide (InP), E =1.35 eV, x=4.4 eV; b. Germanium (Ge), E =0.67 eV, X=4.0 eV; c. Gallium nitride (GaN), Eg=3.437 eV, x=4.1 eV; d. Amorphous silicon dioxide (SiO2), Eg=9 eV, x=0.9 eV. EE430/530: Fundamentals of Semiconductor Devices Huamini. Phochwaminifuffninn 19

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