Deep-red iridium(<scp>iii</scp>) complexes cyclometalated by phenanthridine derivatives for highly efficient solution-processed organic light-emitting diodes

Abstract

The introduction of 4-<italic>tert</italic>-butyl-<italic>N</italic>-phenylaniline groups into phenanthridine derivatives is demonstrated as a simple approach to develop solution-processed deep-red iridium complexes. The resulting PhOLEDs achieve a maximum EQE of 5.2% with the emission peak at 682 nm.