Overestimating the Performance of Photon Ultraviolet Detectors

Over the past few years, the available literature shows signaled great progress in improving the performance of ultraviolet detectors, even exceeding the physical limit of detection determined by signal fluctuations. This is particularly true for Ga2O3 phototransistors and a new generation of photodetectors with active areas containing low-dimensional solids. The purpose of this letter is to show cases of overestimation of the performance of ultraviolet detectors noted by the author and to draw attention to their fundamental physical limitations which are overlooked in the characterization of detectors.