FLS 980 spectrofluorimeter (Edinburgh Instruments, UK). Two detectors (single photon counting PMTs are available to cover the wavelength range from 200 nm – 1700 nm) with independent exit slits and three different excitions sources (450 W ozone free xenon arc lamp, microsecond flashlamps, pulsed diode laser) enables use the FLS980 for both steady state and time-resolved photoluminescence spectroscopy in the ultraviolet and near-infrared spectral range.