Responsive Organometallic Semiconductors for Optoelectronic Applications

In recent years, as the core content of organic optoelectronic research, organic semiconductor materials and their optoelectronic applications have become the research focus of organic optoelectronics field. Conventional organic semiconductors are mostly based on pure organic systems, which can only utilize singlet excited states and cannot effectively utilize triplet states. Based on the spin-orbit coupling effect of metal atoms, organometallic semiconductors break through this limitation, and can utilize both singlet and triplet excited states ( Fig. 1 ). Moreover, they exhibit excellent phosphorescence properties, such as high luminescence efficiency, long luminescence lifetime, and easily tunable luminescence wavelength ( Fig. 1 ). Especially, their long phosphorescence lifetime is very suitable for application in time-resolved luminescence imaging, including time-gated imaging and lifetime imaging.