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The energy gap of silicon is given as approximately:
A0.7 electron volts
B9.1 electron volts
C1.1 electron volts
D5.4 electron volts
Answer & Solution
Correct answer: C. 1.1 electron volts
1. The three group-four elements have very different band gaps.
2. Diamond is the largest and germanium the smallest.
3. For C, Si and Ge the energy gaps are 5.4 eV, 1.1 eV and 0.7 eV respectively.
4. So silicon is about 1.1 eV.
_Source: NCERT Class XII Physics Part II, Ch 14 'Semiconductor Electronics'_
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