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19-12-2022
Physics

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what color would an led made of a direct bandgap semiconductor with bandgap of 2.25 e.v. be? wavelength of different colors of visible light are: red 650nm, orange 590nm, yellow 570nm, green 510, blue 475, indigo 445, violet 400

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tutorconsortium117 tutorconsortium117

22-12-2022

A band gap is the quantity of energy needed to move electrons and holes from the valence band to the conduction band.

What is band gap in a semiconductor?

Band gap refers to the amount of energy needed for electrons and holes to move from the valence band to the conduction band. A band gap of 1.12 eV is present in Si (Silicon) (electron volt).

The term "wide-band-gap semiconductor" refers to a semiconductor having a big value.

The energy gap between bonding and antibonding orbitals widens in proportion to the electronegativity difference. Since it affects a semiconductor's color and conductivity, the band gap is a crucial component of the semiconductor.

A semiconductor is a substance having a non-zero, intermediate-sized band gap that, while acting as an insulator at T=0K, enables thermal excitation of electrons into its conduction band at temperatures below its melting point. An insulator is a substance, in contrast, that has a wide band gap.

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