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The material that has the highest energy gap at room temperature is:
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The correct answer is:
GaAs
Energy bandgap
- An energy band gap is the distance between the valence band of electrons and the conduction band.
- The band gap represents the minimum energy that is required to excite an electron to move from the valence band to the conduction band where it can participate in the conduction process.
Among the following options, Cds have the highest energy gap at room temperature.
Cadium sulphide (Cds) has a band gap of $2.42 \mathrm{eV}$.
Germanium (Ge) has a band gap of 0.7 eV.
Gallium arsenide (GaAs) has a band gap of $1.42 \mathrm{eV}$.
Silicon (Si) has a band gap of $1.1 \mathrm{eV}$.
- An energy band gap is the distance between the valence band of electrons and the conduction band.
- The band gap represents the minimum energy that is required to excite an electron to move from the valence band to the conduction band where it can participate in the conduction process.
Among the following options, Cds have the highest energy gap at room temperature.
Cadium sulphide (Cds) has a band gap of $2.42 \mathrm{eV}$.
Germanium (Ge) has a band gap of 0.7 eV.
Gallium arsenide (GaAs) has a band gap of $1.42 \mathrm{eV}$.
Silicon (Si) has a band gap of $1.1 \mathrm{eV}$.
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