Luminescent material of cuprous iodide complex and preparation method thereof

Abstract

The invention discloses a luminescent material of red-phosphorescence cuprous iodide complex and a preparation method thereof. The phosphorescence complex is obtained through complexation of CuI and a ligand, with a molecular structure of (CuIL)n, wherein L is the ligand, the ligand is electrically neutral heterocyclic ligand 4-(2-benzoxazolyl) pyridine, that is, the combination of the benzoxazolyl and the pyridine. Due to introducing the benzoxazolyl group beneficial to luminescence of molecular excited state and heavy halogen iodine beneficial to intersystem crossing of the excited state into the material, and promotion of the intersystem crossing by metal-to-ligand charge transfer, the material has relatively good phosphorescence performance. The material is obtained by the directly mixing reaction of the ligand with an acetonitrile solution of CuI, has advantages of simple technology, simple equipment, easily-available raw materials, low cost and good thermal stability, and can be used as a photoluminescence red-phosphorescence material, and a phosphorescent material of a luminous layer of an electroluminescent device composed of multilayer organic materials.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, to the fields of photoluminescent materials and electroluminescent materials, in particular to the field of organic electroluminescent materials. Background technique [0002] Materials are recognized as one of the three pillars of the development of modern society. As one of the important functional materials, luminescent materials are widely used in industry, agriculture, medicine, national defense and other fields. For example, they can be used as fluorescent whitening agents, fluorescent pigments, fluorescent dyes, fluorescent reagents, laser dyes, fluorescent powders for lamps, and the like. In particular, the demand for various information displays in today's society and the urgent need for energy-saving lighting under the background of the energy crisis have greatly promoted the rapid development of luminescent materials. [0003] Distinguished from the principle of lumines...

AI Technical Summary

Problems solved by technology

[0006] To analyze more specifically, the red phosphorescent materials currently on sale for OLED are all complexes of noble metal iridium and rare earth metal europium. Although they have performed well in performance, their expensive price also affects the final OLED. Product promotion and application and market performance

The use of copper iodide-based complexes as red phosphorescent materials has a long history (N.Armaroli, G.Accorsi, F.Cardinali, A.Listorti, Top.Curr.Chem.2007, 280, 69-115.), This cheap Cu(I) complex luminescent material can be conveniently prepared from cuprous iodide and suitable organic ligands, but its luminous intensity cannot meet the application requirements in the OLED working temperature range.

Images