A synthetic method of making an organometallic iridium complex, comprising steps of :
step (a): reacting a t-Bu-Ar1-MgX with a nitrogen-containing heteroaryl salt in a nucleophilic reaction, so as to obtain an intermediate; wherein t-Bu represents a tert-butyl group; Ar1 is an arylene group having 5 to 16 carbon atoms or a sulfur-containing heteroarylene group having 4 to 14 carbon atoms; X is a halogen atom; the nitrogen-containing heteroaryl salt is a salt which includes t-Bu-Ar2 group, and Ar2 is a nitrogen-containing heteroaryl group having 5 to 14 carbon atoms;
step (b): oxidizing the intermediate with an oxidant for aromatization, so as to obtain a ligand; and
step (c): reacting the ligand with an iridium(III) acetylacetonate to obtain the organometallic iridium complex.
An organometallic iridium complex represented by the following Formula (I):
wherein Ar1 is an arylene group having 5 to 16 carbon atoms or a sulfur-containing heteroarylene group having 4 to 14 carbon atoms; wherein Ar2 is a nitrogen-containing heteroarylene group having 5 to 14 carbon atoms; wherein t-Bu is a tert-butyl group.