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Enhancing light emission in interface engineered spin-OLEDs through spin-polarized injection at high voltages

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Enhancing light emission in interface engineered spin-OLEDs through spin-polarized injection at high voltages

dc.contributor.author	Prieto Ruiz, Juan Pablo
dc.contributor.author	Gómez Miralles, Sara
dc.contributor.author	Prima García, Helena
dc.contributor.author	López-Muñoz, Ángel
dc.contributor.author	Riminucci, Alberto
dc.contributor.author	Graziosi, Patrizio
dc.contributor.author	Aeschlimann, Martin
dc.contributor.author	Cinchetti, Mirko
dc.contributor.author	Dediu, Valentin Alek
dc.contributor.author	Coronado Miralles, Eugenio
dc.date.accessioned	2020-04-07T09:54:13Z
dc.date.available	2020-04-07T09:54:13Z
dc.date.issued	2019
dc.identifier.citation	Prieto Ruiz, Juan Pablo Gómez Miralles, Sara Prima García, Helena López-Muñoz, Ángel Riminucci, Alberto Graziosi, Patrizio Aeschlimann, Martin Cinchetti, Mirko Dediu, Valentin Alek Coronado Miralles, Eugenio 2019 Enhancing light emission in interface engineered spin-OLEDs through spin-polarized injection at high voltages Advanced Materials 31 10 1806817
dc.identifier.uri	https://hdl.handle.net/10550/73824
dc.description.abstract	The quest for a spin-polarized organic light emitting diode (spin-OLED) is a common goal in the emerging fields of molecular electronics and spintronics. In this device two ferromagnetic electrodes are used to enhance the electroluminescence intensity of the OLED through a magnetic control of the spin polarization of the injected carriers. The major difficulty is that the driving voltage of an OLED device exceeds of a few volts, while spin injection in organic materials is only efficient at low voltages. We report here the fabrication of a spin-OLED that uses a conjugated polymer as bipolar spin collector layer and ferromagnetic electrodes. Through a careful engineering of the organic/inorganic interfaces we have succeeded in obtaining a light-emitting device showing spin-valve effects at high voltages (up to 14 V). This has allowed us to detect a magneto-electroluminescence enhancement on the order of a 2.4 % at 9 V for the antiparallel configuration of the magnetic electrodes. This observation provides evidence for the long-standing fundamental issue of injecting spins from magnetic electrodes into the frontier levels of a molecular semiconductor. Our finding opens the way for the design of multifunctional devices coupling the light and the spin degrees of freedom.
dc.language.iso	eng
dc.relation.ispartof	Advanced Materials, 2019, vol. 31, num. 10, p. 1806817
dc.subject	Materials
dc.subject	Innovacions tecnològiques
dc.title	Enhancing light emission in interface engineered spin-OLEDs through spin-polarized injection at high voltages
dc.type	journal article	es_ES
dc.date.updated	2020-04-07T09:54:13Z
dc.identifier.doi	10.1002/adma.201806817
dc.identifier.idgrec	130979
dc.rights.accessRights	open access	es_ES