Recent Process of Luminescent Materials and Devices Based on Manganese(II) Complexes

Luminescent materials leave been widely applied in the fields of lighting and display. It is significant to develop new luminescent materials with environmental compatibility, low cost and high efficiency. Phosphorescent manganese (II) complexes have attracted much attention due to their excellent luminescent: efficiency, low cost and law toxicity. The phosphorescence of manganese (II) complexes originates from spin forbidden d-d transition and is mainly dependent on the type and strength of ligand field. Since the ligand field of manganese (III) is sensitive to external stimuli and easy to change, which directly affects its photophysical properties, thus enabling the reversible conversion and regulation of luminous colors. Based on the research work in our group on the design of phosphorescent manganese (II) complexes and their photoluminescence and electroluminescence properties, this article is aimed to review the recent progress of manganese (II) halide complexes and various manganese(II) complexes with stimulus-responsive luminescence and their applications in electroluminescent devices. The future development prospect and challenges in this field are prospected.