Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
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)Si and (Eg)Ge respectively. Which one of the following relationships is true in their case?
A
(Eg)C >(Eg)Si
B
(Eg)C = (Eg)Si
C
(Eg)C < (Eg)Ge
D
(Eg)C < (Eg)Si
Answer
(Eg)C >(Eg)Si
Explanation
Solution
For a particular element, germanium has the smallest energy band gap while carbon has the largest.
Therefore, the correct option is (A): (Eg)C > (Eg)Si