Synthesis and electroluminescent characterization of a symmetric starburst orange-red light material

► A symmetric starburst orange-red light material TNGT was designed and synthesized.► TNGT demonstrates a diminished concentration-quenching effect in both PL and EL.► By the way of doping TNGT in a PVK emissive layer, the device was fabricated.► The device showed a high current efficiency of 4.57 cd/A with CIE (0.59, 0.40).