Efficient OLEDs with low efficiency roll-off using iridium complexes possessing good electron mobility

Abstract

Two iridium(<sc>iii</sc>) complexes with high photoluminescence quantum efficiency and electron mobility were synthesized and highly efficient OLEDs (<italic>η</italic>_c,max of 101.96 cd A⁻¹ and <italic>η</italic>_EQE,max of 31.6% for <bold>Ir1</bold>; <italic>η</italic>_c,max of 99.97 cd A⁻¹ and <italic>η</italic>_EQE,max of 30.5% for <bold>Ir2</bold>) were fabricated with low efficiency roll-off ratios.