26‐3: Invited Paper: High Performance and Long Device Lifetime Organic Light‐emitting Diodes Using a Tetradentate Platinum (II) Emitter

The realization of high performance green organic light emitting diodes with long device lifetime using a platinum emitter is demonstrated in this work. The platinum emitter shows a short emission lifetime of 2.7 μs in thin film and a high T d of 489 °C. The Pt OLED with 9 wt% doping concentration exhibited an EQE of up to 20.4% and a current efficiency of up to 70.6 cd A −1 at a current density (luminance) of 20 mA cm −2 (14110 cd m −2 ), respectively. Notably, a respectable device lifetime (LT 95 ) of 373 h at 10000 cd m −2 has been achieved, and this value is comparable to the reference Ir complex.