https://doi.org/10.1351/goldbook.14059
Plot of the photonic yield of a given photoprocess, measured at the same photon flux of incident (prior to absorption) light, as a function of a measure of the energy of the photons, i.e., for monochromatic irradiation.
Notes:
- In practice, the photonic yield spectrum is obtained by normalising the rate of the given process to a certain number of incident photons provided that the photoresponse is linear on the incident photon fluence.
- Should the fluence dependence of the photoresponse be nonlinear (as is often the case in catalysed photoresponses), a plot of the photoresponse vs. fluence should be made at several wavelengths and a standard response should be chosen (e.g., two-lg reduction). A plot of the inverse of the "standard response" level as a function of wavelength is then the action spectrum of the photoresponse.
- Note that in photocatalysis the term yield is reserved for monochromatic irradiation, whereas the term efficiency is used for irradiation within a wavelength range. This is different from the use of efficiency as defined by IUPAC in photochemistry.