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CSE · Paper II · Solid State & Devicescse-2020-subject-08-003

Intrinsic semiconductors — UPSC Physics Optional CSE 2020 Paper II

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What is an intrinsic semiconductor? Intrinsic silicon has a band gap of 1.1\,\mathrm{eV} and yet at T=300\,\mathrm{K}, the conductivity is non-zero. Explain. Comment, with the help of relevant expression, on the position of the Fermi level of an intrinsic semiconductor.

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