DIIMMONIUM TYPE COMPOUND AND NEAR INFRARED RAY ABSORPTION FILTER USING THE SAME

摘要

PURPOSE: A diimonium based compound and a near infrared ray-absorbing filter using the same are provided to display wide and even absorption rate in the near infrared ray region and to improve durability and weatherability. CONSTITUTION: A diimonium based compound has a structure which is represented by chemical formula 1. In the chemical formula 1, R1 - R8 are respectively and independently indicate hydrogen atom(H), substituted or non-substituted aryl having 6-14 carbons, or substituted or non-substituted alkyl group having 1-10 carbons. In the chemical formula 1, n indicates 0 or 1. The substituents of R1 - R8 are selected from the alkyl group having 1-5 carbons and halogens except fluorine. The near infrared ray absorbing filter includes the diimonium based compound.