Orange to Red Iridium(III) Complexes Possessing Good Electron Mobility with Pyrimidine-4-Carboxylic Acid Ligand for High-Performance Solution-Processed OLEDs with an EQE over 31%

Three rigid pyrimidine-4-carboxylic acid ligand-based iridium( iii ) complexes are developed with good electron mobility and the highest solution-processed device efficiency.