A pn junction diode and a Schottky diode have equal cross-sectional areas and have forward-bias currents of 0.5 mA. The reverse-saturation current of the Schottky diode isIS= 5× 10-7A. The difference in forward-bias voltages between the two diodes is 0.30 V. Determine thereverse-saturation current of the pn junction diode.