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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
Author(s) -
Li Yongguang,
Tsang Daniel PingKuen,
Chan Carmen KaMan,
Wong Keith ManChung,
Chan MeiYee,
Yam Vivian WingWah
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201404315
Subject(s) - phosphorescence , photoluminescence , quantum yield , materials science , dopant , bipyridine , oled , quantum efficiency , phosphorescent organic light emitting diode , photochemistry , diode , platinum , light emitting diode , luminescence , light emission , optoelectronics , catalysis , doping , nanotechnology , chemistry , fluorescence , crystallography , organic chemistry , optics , physics , layer (electronics) , crystal structure
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.