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 ?

Question

Dr. Abubacker · Accepted Answer

[Solution from source] Band gaps fall down group 14: carbon (diamond) ≈ 5.5 eV, Si ≈ 1.1 eV, Ge ≈ 0.7 eV. So (Eg)C > (Eg)Si; diamond is an insulator, not a material with a smaller gap. Answer (1).

Q. 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 ?

Explanation

Reviewed by Dr. Abubacker

Want to attempt the full paper?