Calculation section: for each of the following metal-semiconductor junctions answer all parts a. sketch the band-bending diagram at ov bias b. identify the type of junction as schottky or ohmic c. draw the cross section of the ms junction and label the polarity of the space charge region d. sketch the band-bending diagram under forward bias e. sketch the band-bending diagram under reverse bias problem 1) metal: aluminum (wf -4.25ev) semiconductor: silicon (na = 1e15cm, nd = 1e5cm, ea = 4.05ev, eg = 1.1ev) problem 2) metal: cadmium (wf = 4.08ev) semiconductor: gan (na = ocm, nd = 1e10cm, ea = 4.1ev, eg = 3.2ev) problem 3) metal: gold (wf = 5.1ev) semiconductor: ge (na = ocm, nd = 1e14cm', ea = 4.0ev, eg = 0.7ev)