Preparation and properties of Organic-Inorganic hybrid fluorescent materials based on MXene doping

In this paper, AgⅠ was added to the cluster of copper iodide Cu4I4(Gly)3 to generate Cu3I4(Gly)3/Ag in order to introduce impurity energy levels, increase the light absorption efficiency, and simultaneously construct constrained bound excisions to enhance the luminous efficiency. This addition, however, leading to an excessive increase in crystal surface defects, affecting the luminous efficiency of fluorescent materials. Cu3I4(Gly)3/Ag/x·MXene (x=0∼1.0 wt%) is form when MXene is added to Cu3I4(Gly)3/Ag to reduce surface imperfections and build heterojunctions, therefore improving the separation effect of photogenerated electrons and holes. Cu3I4(Gly)3/Ag/0.6·MXene emits orange-red light at 654 nm, expands the UV–vis absorption range, reduces the fluorescence lifetime by 24%, and increases the quantum efficiency by 136%. This work demonstrates that Cu3I4(Gly)3/Ag/x·MXene may be attractive alternatives to toxic lead halide perovskites and unstable copper(I) halides for optical applications.