What is Band gap?

The energy difference between the top of the valence band and the bottom of the conduction band. About 1.12 eV for silicon at room temperature. A larger band gap means better tolerance to high temperatures and voltages.

Field: Semiconductor physics

Band gap in the explanations

Questions that mention Band gap (11)

  1. Which value is closest to the band gap of silicon (Si) at room temperature?
  2. Where in the band gap is the donor level created by phosphorus in silicon?
  3. Which value is closest to the band gap of germanium (Ge) at room temperature?
  4. Which of the following materials has the largest band gap?
  5. What is the process called in which electrons and holes recombine through deep levels (traps) in the band gap?
  6. How does the band gap of silicon change as the temperature rises?
  7. Why is the intrinsic Fermi level of silicon slightly offset from the exact center of the band gap?
  8. What is the general term for semiconductors with a larger band gap than silicon, such as SiC and GaN?
  9. What is the approximate wavelength of light emitted by GaAs, which has a band gap of about 1.42 eV?
  10. Which material, whose band gap can be tuned by composition, has been used for high-performance mid- to long-wave infrared detectors?
  11. Which method evaluates the quality of compound semiconductor wafers and epi layers without contact by shining laser light and measuring the spectrum and intensity distribution of the emitted light?

Related terms

GaN (gallium nitride) Wide-bandgap semiconductor Donor Acceptor Native oxide SiGe (silicon-germanium) Mobility SRH recombination (Shockley-Read-Hall recombination) Dark current Fermi level

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