Luminescent tetradentate ligand-containing gold (III) compounds for organic light-emitting devices and their preparation

Abstract

A series of thermally stable and highly luminescent cyclometalated tetradentate ligand-containing gold (III) compounds was designed and synthesized. The cyclometalated tetradentate ligand-containing gold (III) compounds can be used as light-emitting material for fabrication of light-emitting devices. The cyclometalated tetradentate ligand-containing gold (III) compounds can be deposited as a layer or a component of a layer using a solution-processing technique or a vacuum deposition process. The cyclometalated tetradentate ligand-containing gold (III) compounds are robust and can provide electroluminescence with high efficiency and brightness. More importantly, the vacuum-deposited OLEDs demonstrate long operational stabilities with half-lifetime of over 29,700 hours at 100 cd m<-2>.

Description

technical field

[0001] This paper describes luminescent gold(III) compounds containing cyclometalated tetradentate ligands and the synthesis of these compounds. These compounds can be used as light-emitting materials in phosphorescent organic light-emitting devices (PHOLEDs). In a specific embodiment, the compound has good operational stability, at 100 cd m -2 The lower half-life exceeds 29700 hours. Background technique

[0002] With the advantages of low cost, light weight, low power consumption, high brightness, excellent color tunability, wide viewing angle up to 180 degrees, and easy construction on flexible substrates, organic light-emitting devices (OLEDs) are considered as the and an attractive candidate for solid-state lighting systems. Compared with pure organic complexes, transition metal complexes have been extensively studied in the past three decades due to the presence of heavy metal centers, which can effectively lead to strong spin-orbit coupling, thereby...

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