Which of the following has least band gap energy at $273 K$ .

InSb

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InAs

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InP

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GaSb

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Solution

The correct option is B InSb
The energy gaps of the given semiconductors at $273 K$ are given:
$I n S b = 0.16 e V$ (Indium antimonide),
$I n A s = 0.33 e V$ (Indium arsenide),
$I n P = 1.29 e V$ (Indium phosphide),
$G a S b = 0.67 e V$ (Galiumium antimonide),
It is clear that $I n S b$ has the least energy gap.

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Similar questions

Indium antimonide has a band gap of 0.23 eV between the valence and the conduction band. Find the temperature at which kT equals the band gap.

0.23 eV

k T

(k = Boltzmann constant, T = temperature)

(Take k = 1.38 \times 10^{- 23} {JK}^{- 1})

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