title: Synthesis of unsymmetric bipyridine-Pt(II) -alkynyl complexes through post-click reaction with emission enhancement characteristics and their applications as phosphorescent organic light-emitting diodes.
abstract: Two unsymmetric bipyridine-platinum(II)-alkynyl complexes have been synthesised by a post-click reaction. These metal complexes are found to exhibit emission enhancement properties. The photoluminescence quantum yield can be significantly increased from 0.03 in solution to 0.72 in solid-state thin films. Efficient solution-processable organic light-emitting diodes have been fabricated by utilizing these complexes as phosphorescent dopants. A high external quantum efficiency of up to 5.8% has been achieved.
authors.affiliation: Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P.R. China), Fax: (+852) 2857-1586.
authors.forename: Yongguang
authors.initials: Y
authors.lastname: Li
authors.forename: Daniel Ping-Kuen
authors.initials: DP
authors.lastname: Tsang
authors.forename: Carmen Ka-Man
authors.initials: CK
authors.lastname: Chan
authors.forename: Keith Man-Chung
authors.initials: KM
authors.lastname: Wong
authors.forename: Mei-Yee
authors.initials: MY
authors.lastname: Chan
authors.forename: Vivian Wing-Wah
authors.initials: VW
authors.lastname: Yam
keywords: aggregation enhanced emission; click reactions; organic light-emitting devices; photophysics; platinum