JULOLIDINE-BASED RED FLUOROSCENT MATERIAL, THE PREPARATION THEREOF, AND ORGANIC ELECTROLUMINESCENT DEVICE CONTAINING SAME

摘要

PURPOSE: Provided are a julolidine-based orange or red phosphor excellent in stability, a preparation method thereof, and an organic electroluminescent element containing the julolidine-based orange or red phosphor. CONSTITUTION: The julolidine-based red phosphor represented by the formula (I) is produced by heat-reacting a pyran derivative represented by the formula (II) and a compound represented by the formula (III) in an alcohol solvent in the presence of an amine, wherein A, B, and C are carbon, oxygen, sulfur, or secondary or tertiary nitrogen and R1 and R2 are independently hydrogen, C1-C4 alkyl, C1-C4 alkoxy, or C1-C4 alkyl or C1-C4 alkoxy substituted aryl, aryloxy, or heteroaryl. And the organic electroluminescent element has an organic luminescent layer containing the julolidine-based red phosphor.