Novel iridium complexes with perfluorophenyl‐substituted phenylpyridine ligands have
been developed. The Figure shows the photoluminescence (PL) spectra of four complexes
in the doped films. By changing the position of substitution, the peaks in the PL spectra are
tuned in the wavelength region 513–578 nm. Light‐emitting diodes using these complexes
as the emitting material show an external quantum efficiency of 10–17%.

Color tunable phosphorescent organic light-emitting diodes using pentafluorophenyl-substituted
iridium complexes … Color tunable phosphorescent organic light-emitting diodes using
pentafluorophenyl-substituted iridium complexes … Iridium complex …