Abstract: Described herein are a novel concept of thermally stimulated delayed phosphorescence (TSDP) to harvest light emission from the higher energy triplet excited state via the up-conversion from the lowest-energy triplet excited state by efficient spin-allowed reverse internal conversion as well as the development of TSDP emitters, as exemplified by a novel class of gold(III) compounds with TSDP properties and methods of making and using said compounds. The gold(III) compound includes a triazine-containing cyclometalating tridentate ligand and one auxiliary ligand, both coordinated to a gold(III) metal center. The gold(III) compounds disclosed herein can be used as light-emitting material for fabrication of OLEDs.

Abstract: A novel class of gold (III) compounds with thermally stimulated delayed phosphorescence (TSDP) properties, methods of making and use thereof are disclosed. The gold (III) compound includes a triazine-containing cyclometalating tridentate ligand and one auxiliary ligand, both coordinated to a gold (III) metal center. The gold (III) compounds can be used as light-emitting material for fabrication of OLEDs. A novel concept of TSDP to harvest light emission from the higher energy triplet excited state via the up-conversion from the lowest-energy triplet excited state by efficient spin-allowed reverse internal conversion is also disclosed.