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Q.
$n $ type and $p$ type semiconductors can be obtained by doping pure silicon respectively with
COMEDKCOMEDK 2009Semiconductor Electronics: Materials Devices and Simple Circuits
Solution:
$n$-type and $p$-type semiconductors can be obtained by doping pure silicon or germanium with pentavalent element like $P$, As and trivalent ยท element like $Al$, In, respectively.