GATE EC 2016 Set 1 — Question 48

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NAT+2 / -0MediumDiffusion & Drift CurrentCarrier TransportElectronic Devices

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Question

The figure below shows the doping distribution in a pp-type semiconductor in log scale: NAN_A rises linearly on a logarithmic scale from 1014 cm−310^{14}\text{ cm}^{-3} at position 1 μm1\ \mu\text{m} to 1016 cm−310^{16}\text{ cm}^{-3} at position 2 μm2\ \mu\text{m}. Take kT/q=26 mVkT/q=26\text{ mV}.
Doping distribution graph showing log Na vs Position
The magnitude of the electric field (in kV/cm) in the semiconductor due to non uniform doping is _________
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