Reduced Efficiency Roll-Off of Terdentate Chloroplatinum Emitter-Based Solution-Processed OLEDs through an Oxygen-Bridged N ∧ C ∧ N Polypyridyl Ligand

have been realized, representing one of the highest performances recorded to date based on terdentate platinum complexes. This work provides an effective molecular design strategy to develop terdentate platinum emitter-based highly efficient solution-processed OLEDs with small efficiency roll-off.