Characterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes

Abstract Encasing an OLED between two planar metallic electrodes creates a Fabry–Pérot microcavity, resulting in significant narrowing of the emission bandwidth. The emission from such microcavity OLEDs depends on the overlap of the resonant cavity modes and the comparatively broadband electrolumine...

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Autores principales:	Ekraj Dahal, David Allemeier, Benjamin Isenhart, Karen Cianciulli, Matthew S. White
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6268d35134d84801a794bd19d00ce11e
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spelling	oai:doaj.org-article:6268d35134d84801a794bd19d00ce11e2021-12-02T18:27:49ZCharacterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes10.1038/s41598-021-87697-82045-2322https://doaj.org/article/6268d35134d84801a794bd19d00ce11e2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87697-8https://doaj.org/toc/2045-2322Abstract Encasing an OLED between two planar metallic electrodes creates a Fabry–Pérot microcavity, resulting in significant narrowing of the emission bandwidth. The emission from such microcavity OLEDs depends on the overlap of the resonant cavity modes and the comparatively broadband electroluminescence spectrum of the organic molecular emitter. Varying the thickness of the microcavity changes the mode structure, resulting in a controlled change in the peak emission wavelength. Employing a silicon wafer substrate with high thermal conductivity to dissipate excess heat in thicker cavities allows cavity thicknesses from 100 to 350 nm to be driven at high current densities. Three resonant modes, the fundamental and first two higher harmonics, are characterized, resulting in tunable emission peaks throughout the visible range with increasingly narrow bandwidth in the higher modes. Angle resolved electroluminescence spectroscopy reveals the outcoupling of the TE and TM waveguide modes which blue-shift with respect to the normal emission at higher angles. Simultaneous stimulation of two resonant modes can produce dual peaks in the violet and red, resulting in purple emission. These microcavity-based OLEDs employ a single green molecular emitter and can be tuned to span the entire color gamut, including both the monochromatic visible range and the purple line.Ekraj DahalDavid AllemeierBenjamin IsenhartKaren CianciulliMatthew S. WhiteNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ekraj Dahal David Allemeier Benjamin Isenhart Karen Cianciulli Matthew S. White Characterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes
description	Abstract Encasing an OLED between two planar metallic electrodes creates a Fabry–Pérot microcavity, resulting in significant narrowing of the emission bandwidth. The emission from such microcavity OLEDs depends on the overlap of the resonant cavity modes and the comparatively broadband electroluminescence spectrum of the organic molecular emitter. Varying the thickness of the microcavity changes the mode structure, resulting in a controlled change in the peak emission wavelength. Employing a silicon wafer substrate with high thermal conductivity to dissipate excess heat in thicker cavities allows cavity thicknesses from 100 to 350 nm to be driven at high current densities. Three resonant modes, the fundamental and first two higher harmonics, are characterized, resulting in tunable emission peaks throughout the visible range with increasingly narrow bandwidth in the higher modes. Angle resolved electroluminescence spectroscopy reveals the outcoupling of the TE and TM waveguide modes which blue-shift with respect to the normal emission at higher angles. Simultaneous stimulation of two resonant modes can produce dual peaks in the violet and red, resulting in purple emission. These microcavity-based OLEDs employ a single green molecular emitter and can be tuned to span the entire color gamut, including both the monochromatic visible range and the purple line.
format	article
author	Ekraj Dahal David Allemeier Benjamin Isenhart Karen Cianciulli Matthew S. White
author_facet	Ekraj Dahal David Allemeier Benjamin Isenhart Karen Cianciulli Matthew S. White
author_sort	Ekraj Dahal
title	Characterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes
title_short	Characterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes
title_full	Characterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes
title_fullStr	Characterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes
title_full_unstemmed	Characterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes
title_sort	characterization of higher harmonic modes in fabry–pérot microcavity organic light emitting diodes
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6268d35134d84801a794bd19d00ce11e
work_keys_str_mv	AT ekrajdahal characterizationofhigherharmonicmodesinfabryperotmicrocavityorganiclightemittingdiodes AT davidallemeier characterizationofhigherharmonicmodesinfabryperotmicrocavityorganiclightemittingdiodes AT benjaminisenhart characterizationofhigherharmonicmodesinfabryperotmicrocavityorganiclightemittingdiodes AT karencianciulli characterizationofhigherharmonicmodesinfabryperotmicrocavityorganiclightemittingdiodes AT matthewswhite characterizationofhigherharmonicmodesinfabryperotmicrocavityorganiclightemittingdiodes
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Characterization of higher harmonic modes in Fabry–Pérot microcavity organic light emitting diodes

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