Maximum power spectroscopy of n-type, a-Si:H, c-Si, CdSe, and InP in non-aqueous photoelectrochemical cells.

Amorphous silicon photoanodes in a non-aqueous photoelectrochemical cell have output power dependent on the energy, not only the number, of absorbed photons. This behavior has been studied by maximum power spectroscopy (MPS) and compared to similar experiments with conventional short circuit spectroscopy. The derivative maximum power output under constant chopped input power (MPS) shows dependence on the wavelength distribution in superimposed fixed beams whereas the conventional short circuit measurements do not.