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Determine permittivity of p-i-n photodiode with junction capacitance of 5pF, area of 0.62×10-6m2 and intrinsic region width of 28 μm.

Determine permittivity of p-i-n photodiode with junction capacitance of 5pF, area of 0.62×10-6m2 and intrinsic region width of 28 μm. Correct Answer 2.25×10-10

The junction capacitance is given by, Cj = εsA/ W εs = Cj w/A = 5×10-12×28×10-6/0.62×10-6 = 2.25×10-10Fcm-1.

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