Fourier-Transform Photocurrent Spectroscopy (FTPS)

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By measuring the photocurrent, it is possible to obtain information about the optical absorption of the material, mainly in focus to defect states. The measurement is performed either in a Fourier mode called FTPS (Fourier-transform photocurrent spectroscopy) or in mode called CPM (Constant photocurrent measurement). The FTPS works in the 370-2500 nm range and employs the Thermo Nicolet 8700 FTIR spectrometer. The CPM works in the 250-2500 nm range and uses the Andor Kymera 328i monochromator.