ifos • paper_2 • solid_state_electronics
[UPSC IFoS 2022] Band theory of solids (Q60, 3+5=8M)
(i) Diamond and silicon have similar band structure. Why is diamond an insulator while silicon a semiconductor? (ii) An insulator has an optical absorption which occurs for all wavelengths lesser than 1400\text{ \AA}. Find the width of the forbidden energy band for the insulator.
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