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Semiconductors PowerPoint Presentation
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Semiconductors

Semiconductors

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Semiconductors

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  1. Semiconductors

  2. Learning Objective Distinguish between the p-typeand n-type semiconductors.

  3. n-type semiconductors • Obtained when group 14 elements doped with group 15 elements. • Electron is responsible for electrical conduction. • Example: Arsenic doped insilicon. • p-type semiconductors • Obtained when a group 14element is doped with group 13 element. • Holes responsible for conduction. • Example: aluminum doped in silicon.

  4. Applications of n-type and p-type semiconductors • Diode is a combination of n-type and p-type semiconductors and is used as a rectifier. • npn and pnp type of transistors are used to detect or amplify radio or audio signals. • The solar cell is an efficient photo-diode used for conversion of light energy • into electrical energy.