| abstract |
The invention belongs to the field of organic optoelectronic materials, in particular to an organic optoelectronic molecular material containing a thienothiadiazole structure and a preparation method and application thereof. The present invention adopts thienothiadiazole as the central unit, thiophene derivatives as the connecting unit, and the terminal structure is 2-(2-methylene-3-oxo-2,3-dihydro-1H-indene-1- subunit) malononitrile or 2-methylene-1H-indene-1,3(2H)-dione; therefore, it has good planarity and can form good conjugation, which is conducive to the delocalization of molecular orbitals, Improve molecular extinction coefficient, and promote charge separation and transport. The prepared organic photoelectric molecule has an absorption spectrum range of more than 1.1 μm, which is conducive to further expansion of the spectrum, and retains the advantages of high crystallinity and high near-infrared extinction coefficient, and is easily soluble in organic solvents. High-quality thin films can be prepared by solution method. . It is of great significance for the development and application of wide-spectrum organic NIR photodetectors. |