Carbon, silicon, and germanium atoms have fou | vedclass

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Question

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

Vedclass · Accepted Answer

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

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(A) The energy band gap $(E_g)$ is the energy difference between the valence band and the conduction band.For carbon (diamond), the energy band gap is approximately $5.4 	ext{ eV}$.For silicon, the energy band gap is approximately $1.1 	ext{ eV}$.For germanium, the energy band gap is approximately $0.7 	ext{ eV}$.Comparing these values, we find that $(E_g)_C > (E_g)_{Si} > (E_g)_{Ge}$.Therefore, the correct relationship is $(E_g)_C > (E_g)_{Si}$.

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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