Device with platinum(II) complexes bearing tetradentate ligand with a bridging tertiary amine (tetra-Pt-N) as the active layer material with double-host TCTA:B3PYPM, and B3PYPM as the interlayer between the emissive layer and TmPPPyTz as the electron-transport layer, achieved a maximum power efficiency of over 100 lm/W, a low turn-on voltage of less than 2.5 V and low efficiency roll-off.
TmPPPyTz has a similar structure to 3N-T2T which tends to form exciplex with electron donor as co-host or emitting layer material.