Question
Arrange in terms of ascending order of band gap. A. Si B. GaN C. InSb D. GaAs E. AlAs Choose the correct answer from the options given below:
The correct answer is
C, A, D, E, B
Ordering Semiconductors by Band Gap
This solution determines the ascending order of band gap energy for the given semiconductor materials: Si, GaN, InSb, GaAs, and AlAs.
Semiconductor Band Gap Values
| Material | Symbol | Approximate Band Gap Energy (at 300K) |
| Indium Antimonide | C | $ \approx 0.17 $ eV |
| Silicon | A | $ \approx 1.12 $ eV |
| Gallium Arsenide | D | $ \approx 1.42 $ eV |
| Aluminum Arsenide | E | $ \approx 2.16 $ eV |
| Gallium Nitride | B | $ \approx 3.4 $ eV |
Determining Ascending Band Gap Order
Arranging the materials based on the band gap values from smallest to largest:
- Smallest Band Gap: InSb (C) at $ \approx 0.17 $ eV
- Next Smallest: Si (A) at $ \approx 1.12 $ eV
- Next: GaAs (D) at $ \approx 1.42 $ eV
- Next: AlAs (E) at $ \approx 2.16 $ eV
- Largest Band Gap: GaN (B) at $ \approx 3.4 $ eV
Final Correct Order
The sequence of materials in ascending order of their band gap energy is C, A, D, E, B.
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