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What are extrinsic semiconductor?...

What are extrinsic semiconductor?

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An extrinsic semiconductor is a semiconductor doped by a specific impurity which is able to deeply modify its electrical properties, making it suitable for electronic applications (diodes, transistors etc.) or optoelectronic applications (light emitters and detectors)
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What are intrinsic semiconductor?

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Sketch and explain the energy band diagram of intrinsic and extrinsic semiconductors .

Lets n_p and n_e be the number of holes and conduction electrons in an extrinsic semiconductor.

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