EE 436 Physics of Transistors G. Tuttle

pn-junction current practice problems
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A uniformly doped GaAs p-n junction has n-type doping of 1.0e+17 cm-3 and p-type doping of 9.0e+17 cm-3.

The width of the n-type quasi-neutral region is 4 μm, and the width of the p-type quasi-neutral region is 6 μm.

The diode area is 100 μm x 100 μm.

The applied voltage is 0.65 V.

Calculate the diode current at room temperature:

Note: For GaAs,


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