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The shiny side of copper: bringing copper(i) light-emitting electrochemical cells closer to application

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The shiny side of copper: bringing copper(i) light-emitting electrochemical cells closer to application

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dc.contributor.author	Keller, Sarah
dc.contributor.author	Prescimone, Alessandro
dc.contributor.author	La Placa, Maria-Grazia
dc.contributor.author	Junquera-Hernández, José M.
dc.contributor.author	Bolink, Henk
dc.contributor.author	Constable, Edwin C.
dc.contributor.author	Sessolo, Michele
dc.contributor.author	Ortí Guillén, Enrique
dc.contributor.author	Housecroft, Catherine E.
dc.date.accessioned	2020-11-04T15:21:13Z
dc.date.available	2020-11-04T15:21:13Z
dc.date.issued	2020
dc.identifier.citation	Keller, Sarah Prescimone, Alessandro La Placa, Maria-Grazia Junquera-Hernández, José M. Bolink, Henk Constable, Edwin C. Sessolo, Michele Ortí Guillén, Enrique Housecroft, Catherine E. 2020 The shiny side of copper: bringing copper(i) light-emitting electrochemical cells closer to application Rsc Advances 10 22631 22644
dc.identifier.uri	https://hdl.handle.net/10550/76241
dc.description.abstract	Heteroleptic [Cu(P^P)(N^N)][PF6] complexes, where N^N is 5,5′-dimethyl-2,2′-bipyridine (5,5′-Me2bpy), 4,5,6-trimethyl-2,2′-bipyridine (4,5,6-Me3bpy), 6-(tert-butyl)-2,2′-bipyridine (6-tBubpy) and 2-ethyl-1,10-phenanthroline (2-Etphen) and P^P is either bis(2-(diphenylphosphino)phenyl)ether (POP, PIN [oxydi(2,1-phenylene)]bis(diphenylphosphane)) or 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (xantphos, PIN (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane)) have been synthesized and their NMR spectroscopic, mass spectrometric, structural, electrochemical and photophysical properties were investigated. The single-crystal structures of [Cu(POP)(5,5′-Me2bpy)][PF6], [Cu(xantphos)(5,5′-Me2bpy)][PF6], [Cu(POP)(6-tBubpy)][PF6], [Cu(POP)(4,5,6-Me3bpy)][PF6]·1.5Et2O, [Cu(xantphos)(4,5,6-Me3bpy)][PF6]·2.33CH2Cl2, [Cu(POP)(2-Etphen)][PF6] and [Cu(xantphos)(2-Etphen)][PF6] are described. While alkyl substituents in general exhibit electron-donating properties, variation in the nature and substitution-position of the alkyl group in the N^N chelate leads to different effects in the photophysical properties of the [Cu(P^P)(N^N)][PF6] complexes. In the solid state, the complexes are yellow to green emitters with emission maxima between 518 and 602 nm, and photoluminescence quantum yields (PLQYs) ranging from 1.1 to 58.8%. All complexes show thermally activated delayed fluorescence (TADF). The complexes were employed in the active layer of light-emitting electrochemical cells (LECs). The device performance properties are among the best reported for copper-based LECs, with maximum luminance values of up to 462 cd m−2 and device half-lifetimes of up to 98 hours.
dc.language.iso	eng
dc.relation.ispartof	Rsc Advances, 2020, vol. 10, p. 22631-22644
dc.subject	Electroquímica
dc.subject	Cèl·lules fotoelèctriques
dc.title	The shiny side of copper: bringing copper(i) light-emitting electrochemical cells closer to application
dc.type	journal article	es_ES
dc.date.updated	2020-11-04T15:21:13Z
dc.identifier.doi	10.1039/D0RA03824E
dc.identifier.idgrec	141177
dc.rights.accessRights	open access	es_ES