Organic electroluminescent compound containing iridium, preparation method thereof and organic electroluminescent device

摘要

An organic electroluminescent compound containing Iridium, preparation method thereof and an organic electroluminescent device are disclosed. The compound is represented by the structure (2), wherein, R is C1˜C4 alkyl. The structure of the compound contains bipyridine ligand, also carries alkoxy group and fluorine atom, which improves its carrier injection and transfer ability, and increases its internal quantum efficiency and electroluminescent efficiency. Furthermore, the compound uses strong field ligand 2-pyridine carboxylic acid as assistant ligand, which causes an effective blue shift of its emission spectrum and increases light-emitting efficiency of blue light phosphorescence greatly.;

主权项

1. A method of preparing an organic electroluminescent compound containing Iridium, wherein said method comprises the following steps:
S1: under an oxygen-free atmosphere, compound A of structural formulaand Iridium trichloride trihydrate in a molar ratio of 3:1 to 5:1 are added to the first organic solvent, and dissolved to react in the formation of double-bridged compound B of structural formulawherein, R is C1˜C4 alkyl;
S2: under an oxygen-free atmosphere, said double-bridged compound B and 2-pyridinecarboxylic acid in a molar ratio of 1:2.5 to 1:3.5 are added to the second organic solvent to undergo ligand exchange in the formation of said organic electroluminescent compound containing Iridium of structural formula