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A Phosphorescent Poly(dendrimer) Containing Iridium(III) Complexes: Synthesis and Light-Emitting Properties

A poly(styrene) with pendant dendronized iridium(III) complexes attached to every repeat unit was prepared in good yields using a free radical polymerization of a “macromonomer”. The dendronized pendant groups were heteroleptic iridium(III) complexes comprised of two 2-phenylpydridyl ligands, to whi...

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Published in:Macromolecules 2010-09, Vol.43 (17), p.6986-6994
Main Authors: Lai, Wen-Yong, Levell, Jack W, Jackson, Andrew C, Lo, Shih-Chun, Bernhardt, Paul V, Samuel, Ifor D. W, Burn, Paul L
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cited_by cdi_FETCH-LOGICAL-a289t-4e296f95c3b0007bb75e1995d1291285488274efebba372c79c1b3f1129163e13
cites cdi_FETCH-LOGICAL-a289t-4e296f95c3b0007bb75e1995d1291285488274efebba372c79c1b3f1129163e13
container_end_page 6994
container_issue 17
container_start_page 6986
container_title Macromolecules
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creator Lai, Wen-Yong
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Burn, Paul L
description A poly(styrene) with pendant dendronized iridium(III) complexes attached to every repeat unit was prepared in good yields using a free radical polymerization of a “macromonomer”. The dendronized pendant groups were heteroleptic iridium(III) complexes comprised of two 2-phenylpydridyl ligands, to which first generation biphenyl dendrons with 2-ethylhexyloxy surface groups were attached, and a phenyltriazolyl coligand that formed the attachment point to the polymer backbone. Dendronization of the pendant iridium(III) complexes was found to improve thermal stability, solubility, and solution (61%) and solid-state (13%) photoluminescence quantum yields (PLQYs) relative to the nondendronized homopolymer. Viscosity under normal solution processing conditions of 25 mg/mL was found to be 1.23 cSt. Importantly, although the phosphorescent iridium(III) chromophores are held closely along the polymer backbone, they do not significantly reduce the PLQY in solution by intrachain chromophore interactions. Simple bilayer organic light-emitting diodes comprising a blend of the poly(dendrimer) with 4,4-bis(N-carbazolyl)biphenyl and an electron transporting layer had good performance with an external quantum efficiency of 6.2% at 100 cd/m2.
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Applied sciences
Electronics
Exact sciences and technology
Optoelectronic devices
Organic polymers
Physicochemistry of polymers
Polymers with particular properties
Preparation, kinetics, thermodynamics, mechanism and catalysts
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
title A Phosphorescent Poly(dendrimer) Containing Iridium(III) Complexes: Synthesis and Light-Emitting Properties
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