title: Design Strategy for High-Performance Dendritic Carbazole-Containing Alkynylplatinum(II) Complexes and Their Application in Solution-Processable Organic Light-Emitting Devices.
abstract: A new class of luminescent dendritic carbazole-containing alkynylplatinum(II) complexes has been synthesized, characterized, and applied as phosphorescent dopants in the fabrication of solution-processable organic light-emitting devices (OLEDs). These complexes exhibit high photoluminescence quantum yields of up to 80% in spin-coated thin films. In addition, the incorporation of carbazole dendrons into the platinum(II) center can significantly suppress intermolecular interactions in solid-state thin films, giving rise to emission spectra that are similar to those found in solution irrespective of dopant concentrations. High-performance solution-processable OLEDs have also been fabricated, with a maximum external quantum efficiency of up to 10.4%, which is comparable to that of the vacuum-deposited devices based on the small-molecule counterpart. This is one of the highest ever reported values for solution-processable devices based on platinum(II) complexes with tridentate ligands.
authors.affiliation: Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, China.
authors.forename: Fred Ka-Wai
authors.initials: FK
authors.lastname: Kong
authors.affiliation: Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, China.
authors.forename: Man-Chung
authors.initials: MC
authors.lastname: Tang
authors.affiliation: Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, China.
authors.forename: Yi-Chun
authors.initials: YC
authors.lastname: Wong
authors.affiliation: Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, China.
authors.forename: Mei-Yee
authors.initials: MY
authors.lastname: Chan
authors.affiliation: Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, China.
authors.forename: Vivian Wing-Wah
authors.initials: VW
authors.lastname: Yam