Green-light iridium (III) complex, preparation method thereof and application of complex in organic electroluminescence

• Main Authors: XU QIULEI, TENG MINGYU, YOU XIAOZENG, ZHENG YOUXUAN, ZUO JINGLIN
• Format: Patent
• Language: English
• Published: 01.07.2015
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; PAINTS; POLISHES; SEMICONDUCTOR DEVICES

An iridium (III) complex comprises a main ligand of 2-(2-fluoro-4-trifluoromethyl phenyl) pyridine, and an assistant ligand of a derivative of bis(diaryl phosphinyl) amine, and has the structural formula shown in the specification. An ITO (indium tin oxide)/TAPC (60nm)/the complex (8wt%):SimCP2 (30nm)/TPBi (60nm)/LiF (1nm)/Al (100nm) electroluminescent device structure is adopted. All the devices can present green light emission of the complex under different doping concentrations and different current densities, the emission peak is positioned at about 510nm, and the color coordinate is as follows: x = 0.23 and y = 0.64. All the devices have low start voltage (3.4-3.7V), high power efficiency (18.32-25.45lm/W), and high current efficiency (32.72-43.58cd/A). The best device performance is achieved when the doping concentration is 8wt%. The excellent performances of the devices indicate that the complex has application value in preparation of organic electroluminescent devices. The invention also discloses a synthetic method of the complex, and a structure and preparation method of the organic electroluminescent device.