Blue Light Emitting Electrochemical Cells Incorporating Triazole-based Luminophores

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Blue Light Emitting Electrochemical Cells Incorporating Triazole-based Luminophores

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title Blue Light Emitting Electrochemical Cells Incorporating Triazole-based Luminophores
contributor.author Fern©ndez-Hern©ndez, Jes©s M.
contributor.author Ladouceur, S.
contributor.author Shen, Y.
contributor.author Iordache, A.
contributor.author Wang, X.
contributor.author Donato, L.
contributor.author Gallagher-Duval, S.
contributor.author de Anda Villa, Manuel
contributor.author Slinker, Jason D.
contributor.author De Cola, L.
contributor.author Zysman-Colman, E.
contributor.utdAuthor Slinker, Jason D.
contributor.ISNI 0000 0001 2791 9795 (Slinker, JD)
description.abstract We report the electrochemical, photoluminescence, and electroluminescence properties of four fluorinated cationic iridium complexes bearing pyridyltriazole ancillary ligands. All the complexes display unstructured emission in the true blue region at 298 K with photoluminescent λem ranging from 452 to 487 nm in acetonitrile solution, in powder and in PMMA doped thin films. The nature of the emission is a mixed metal-to-ligand/ligand-to-ligand charge transfer state. Photoluminescence (PL) quantum efficiencies both in solution and in the solid state were low while excited state decay kinetics were found to be multiexponential. Each complex undergoes quasi-reversible oxidation and irreversible reduction with large HOMO-LUMO gaps. A detailed computational investigation corroborates the spectroscopic assignments. Additionally, light-emitting electrochemical cells (LEECs) were fabricated for each of the four complexes. The electroluminescence (EL) spectra of all complexes were red-shifted relative to the PL spectra. The LEEC containing 2a is the bluest emitter (λmax = 487 nm) of the family of complexes.
identifier.issn 2050-7534
identifier.uri http://hdl.handle.net/10735.1/3691
identifier.bibliographicCitation Fernández-Hernández, J. M., S. Ladouceur, Y. Shen, A. Iordache, et al. 2013. "Blue light emitting electrochemical cells incorporating triazole-based luminophores." Journal of Materials Chemistry C 1(44): 7440-7452
identifier.volume 1
identifier.issue 44
identifier.startpage 7440
date.created 2013-09-20
date.issued 2013-09-20
date.submitted 2013-07-09
date.submitted Ligands
date.submitted Triazoles
date.submitted Silica gel
relation.uri http://dx.doi.org/10.1039/C3TC31307G
rights ©2014 The Royal Society of Chemistry. This article may not be further made available or distributed.
language.iso en
source Journal of Materials Chemistry C

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