Question

A p-type semiconductor is
(a) positively charged
(b) negatively charged
(c) uncharged
(d) uncharged at O K but charged at higher temperatures.

Answer 1

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Negatively charged

Answer 2

When impurity atoms hold the Germanium atom's place in a Germanium crystal, three p-type substance electrons form covalent bonds by exchanging electrons with three neighboring Germanium atoms.

Explanation:

Option (c) is correct.

• A p-type semi conductors is formed through the doping with a p-type material of a pure semiconductor. When impurity atoms hold the Germanium atom's place in a Germanium crystal, three p-type substance electrons form covalent bonds by exchanging electrons with three neighboring Germanium atoms.
• The 4th covalent bond, however, is left incomplete, with one electron wanting. It makes for a vacuum. The p-type substance is also neutral, since the atom as a whole is neutral.

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