Abstract
MXenes have attracted increasing attention from the research community due to several unique properties that make them suitable for many applications. As a rapidly growing family of 2D transitional metal carbides and nitrides, they have demonstrated very promising properties in electrochemical devices. Recently, a few reports have emerged showing that MXenes have interesting optoelectronic properties. In this review, the fundamental properties of MXenes are discussed, especially those related to optoelectronic properties, and the recent reports on MXene-based optoelectronic applications including photovoltaic, plasmonic, photodetector, phototransistor, and light-emitting diode applications are reviewed. Last, and most importantly, a vision and a road map is articulated for the future research directions that make the most sense for this important class of materials.