Quantum Efficiency - Spectral Responsivity

Spectral Responsivity

Spectral responsivity is a similar measurement, but it has different units: amperes per watt (A/W); (i.e. how much current comes out of the device per incoming photon of a given energy and wavelength). Both the quantum efficiency and the responsivity are functions of the photons' wavelength (indicated by the subscript λ).

To convert from responsivity (Rλ, in A/W) to QEλ (on a scale 0 to 1):

where λ is in nm, h is the Planck constant, c is the speed of light in a vacuum, and e is the elementary charge.

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