Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C, (Eg)siand (Eg )Ge,respectively. Which one of the following relationship is true in their case?
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a
(Eg)C> (Eg)si
b
(Eg)C= (Eg)si
c
(Eg)C< (Eg )Ge,
d
(Eg)C< (Eg)si
answer is A.
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Detailed Solution
Forbidden energy gap for carbon is greater than that of silicon.