most diodes today are based on semi-conductorp-njunctions. in a p-n diode, conventional current is from the p-type side (the anode) to the n- type side (the cathode) , but not in the opposite direction. another type of semiconductor diode, the schottky diode, is formed from the contact between a metal and a semiconductor ranther than by a p - n junction.
a semiconductor diode's current voltage characteristic, or I - V curve, is related to the transport of carrier thrugh the so called depletion layer or depletion region that exits at the p-n junction between differing
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