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dc.contributor.authorArcher, Emily
dc.contributor.authorHillebrandt, Sabina
dc.contributor.authorKeum, Changmin
dc.contributor.authorMurawski, Caroline
dc.contributor.authorMurawski, Jan
dc.contributor.authorTenopala-Carmona, Francisco
dc.contributor.authorGather, Malte C.
dc.identifier.citationArcher , E , Hillebrandt , S , Keum , C , Murawski , C , Murawski , J , Tenopala-Carmona , F & Gather , M C 2021 , ' Accurate efficiency measurements of organic light-emitting diodes via angle-resolved spectroscopy ' , Advanced Optical Materials , vol. 9 , no. 1 , 2000838 .
dc.identifier.otherPURE: 270820054
dc.identifier.otherPURE UUID: 558e05ce-a382-4fa4-84b3-544bd0021f5d
dc.identifier.otherORCID: /0000-0002-4857-5562/work/83481870
dc.identifier.otherORCID: /0000-0002-4603-034X/work/83481904
dc.identifier.otherWOS: 000587338800001
dc.identifier.otherScopus: 85096639253
dc.descriptionFunding: EPSRC NSF-CBET lead agency agreement (EP/R010595/1, 1706207), the Leverhulme Trust (RPG-2017-231), the Volkswagen Foundation (No. 93404), and the Alexander von Humboldt Stiftung (Humboldt-Professorship to M.C.G.). C.K. acknowledges support from the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1A6A3A03012331). Diese Arbeit wurde mitfinanziert durch Steuermittel auf der Grundlage des vom Sächsischen Landtag beschlossenen Haushaltes.en
dc.description.abstractThe accurate characterization of thin-film LEDs – including organic light emitting diodes (OLEDs), perovskites and quantum dot LEDs – is crucial to our understanding of the factors that influence their efficiency and thus to the fabrication of LEDs with improved performance and stability. In addition, detailed information about the angular characteristics of LED emission is useful to assess the suitability of individual architectures, e.g. for display applications. Here, the implementation of a goniometer-based measurement system and corresponding protocol are described that allow to accurately determine the current-voltage-luminance characteristics, external quantum efficiency and luminous efficacy of OLEDs and other emerging thin-film LEDs. The system allows recording of angle-resolved electroluminescence spectra and accurate efficiency measurements for devices with both Lambertian and non-Lambertian emission characteristics. A detailed description of the setup and a protocol for assembling and aligning the required hardware are provided. Drawings of all custom parts and the open-source Python software required to perform the measurement and to analyze the data are included.
dc.relation.ispartofAdvanced Optical Materialsen
dc.rightsCopyright © 2020 The Authors. Advanced Optical Materials published by Wiley‐VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.subjectAngle-resolved electroluminescenceen
dc.subjectExternal quantum efficiencyen
dc.subjectNon-Lambertian emissionen
dc.subjectThin-film LEDsen
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleAccurate efficiency measurements of organic light-emitting diodes via angle-resolved spectroscopyen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.Sir James Mackenzie Institute for Early Diagnosisen
dc.contributor.institutionUniversity of St Andrews.Centre for Biophotonicsen
dc.contributor.institutionUniversity of St Andrews.Biomedical Sciences Research Complexen
dc.description.statusPeer revieweden

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