Ti3C2Tx MXene for organic/perovskite optoelectronic devices

MXenes are emerging two-dimensional (2D) nanomaterials composed of transition metal carbides and/or nitrides and possess unique layered structures with abundant surface functional groups, which enable them with excellent and tunable properties. MXenes films can be solution-processed in polar solvents and are very suitable for optoelectronic device applications. Especially, Ti3C2Tx MXene with the clear advantages of facile synthesis, flexible surface controlling, easily tunable work function, high optical transmittance and excellent conductivity shows great potential for applications in organic/perovskite optoelectronic devices. Therefore, this review briefly introduces the mainstream synthesis methods, optical and electrical properties of MXenes, and comprehensively summarizes the versatile applications of Ti3C2Tx MXene in different functional layers (electrode, interface layer and active layer) of organic/perovskite optoelectronic devices including solar cells and light-emitting diodes. Finally, the current application characteristics and the future possibilities of MXenes in organic/perovskite optoelectronic devices are concluded and discussed.