Carbon,Silicon,and Germanium atoms have four | vedclass

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Question

(A) The energy band gap $(E_g)$ is the energy difference between the conduction band and the valence band. For Carbon (diamond),Silicon,and Germanium,

Vedclass · Accepted Answer

$(E_g)_C > (E_g)_{Si} > (E_g)_{Ge}$

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(A) The energy band gap $(E_g)$ is the energy difference between the conduction band and the valence band. For Carbon (diamond),Silicon,and Germanium,the values of the energy band gaps are approximately: $(E_g)_C \approx 5.4 \ eV$ $(E_g)_{Si} \approx 1.1 \ eV$ $(E_g)_{Ge} \approx 0.7 \ eV$ Comparing these values,we observe that $(E_g)_C > (E_g)_{Si} > (E_g)_{Ge}$. Therefore,the correct relationship is $(E_g)_C > (E_g)_{Si} > (E_g)_{Ge}$.

Carbon,Silicon,and Germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $(E_g)_C$,$(E_g)_{Si}$,and $(E_g)_{Ge}$ respectively. Which one of the following relationships is true in their case?

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