High Intensity Solid-State UV Source for Time-Gated Luminescence Microscopy 

Abstract

 To our knowledge, we are the first to report the existence of low intensity self-excited visible luminescence from GaN-based LEDs that persisted for some time following switch-off and that can present a problem when the devices are used in pulse fluorometry applications. We investigated the suitability of these devices as excitation sources for TGLM and this is the first report of both the temporal and spectral characteristics of excitation pulses obtained from UV LEDs.