Semiconductors

SemiconductorsandTypesofSemiconductor

Semiconductors – Type, Applications, Uses & Example

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Semiconductors are the materials, whose conductivity lies between metals and insulators. They are characterised by narrow energy gap (≈1eV) between the valence band and conduction band. At room temperature all semiconductors behave like insulator. On the basis of purity, semiconductors are of two types. 1. Intrinsic Semiconductors 2. Extrinsic Semiconductors 1. Intrinsic Semiconductors An intrinsic semiconductors […]

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Classificationofmetals2Cconductorsandsemiconductors

Classification of Metals, Conductors and Semiconductors

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On the basis of the relative values of electrical conductivity(σ) and resistivity(ρ=1/σ), the solid are broadly classified as 1. Metals They have very low resistivity or high conductivity. Resistivity ρ ≈ 10⁻² – 10⁻⁸ Ωm  and Conductivity σ = 10²  – 10⁸ S/m (Siemens/metre) 2. Insulators They have high resistivity or low conductivity. Resistivity ρ ≈ 10¹¹ – 10¹⁹ Ωm  and  Conductivity

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