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  4. When boron is added as an impurity to silicon, the resulting material is

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Q. When boron is added as an impurity to silicon, the resulting material is

J & K CETJ & K CET 2007Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Boron is a trivalent impurity having three valence electrons. When it is introduced to pure silicon, then such type of semiconductors are called $p$-type or acceptor type semiconductors.