Physics A-Level
Band gap and photon energy
What Band gap and photon energy means in Physics A-Level, as defined for AQA.
Definition of Band gap and photon energy
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Reference: AQA
The spectral response peaks where photon energy is just above the band gap, and falls at long wavelength once photons cannot free electrons.
Topics that use Band gap and photon energy
- Photodiode (A-level only) (AQA A-Level)
Related terms
- Photo-conductive mode
- Photocurrent
- Photocurrent against voltage at fixed irradiance
- RC time constant
- Responsivity against wavelength
- Reverse bias
- Scintillator
- Spectral response
Using Band gap and photon energy in the exam
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