Fourier-Transform Photocurrent Spectroscopy (FTPS)

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.