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 ) G

Question

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?

TestHub · Accepted Answer

Carbon, silicon and germanium are semiconductors. ​ ( E g ​ ) C ​ = 5.2 eV ( E g ​ ) Si ​ = 1.21 eV ( E g ​ ) Ge ​ = 0.75 eV ​ Thus, ( E g ​ ) C ​ > ( E g ​ ) Si ​ and ( E g ​ ) C ​ > ( E g ​ ) Ge ​ NOTE : Elements carbon, silicon and germanium are found in IVA group of periodic table.

Physics - Semiconductors Question with Solution | TestHub

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