Physics A-Level
Photocurrent
What Photocurrent means in Physics A-Level, as defined for AQA.
Definitions of Photocurrent
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Reference: AQA
Produced when absorbed photons create electron-hole pairs, which are separated by the field; approximately proportional to irradiance over the intended operating range.
Produced when photons entering the depletion region generate electron-hole pairs, proportional to light intensity.
Topics that use Photocurrent
- Photodiode (A-level only) (AQA A-Level)
Related terms
- Band gap and photon energy
- Photo-conductive mode
- Photocurrent against voltage at fixed irradiance
- RC time constant
- Responsivity against wavelength
- Reverse bias
- Scintillator
- Spectral response
Using Photocurrent in the exam
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