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The Weak Microcavity as an Enabler for Bright and Fault-tolerant Light-emitting Electrochemical Cells
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-1903-9875
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0003-3481-5163
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics. Department of Chemistry - Ångström Laboratory, Uppsala University, Uppsala, Sweden.
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2018 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, article id 6970Article in journal (Refereed) Published
Abstract [en]

The light-emitting electrochemical cell (LEC) is functional at substantial active-layer thickness, and is as such heralded for being fit for low-cost and fault-tolerant solution-based fabrication. We report here that this statement should be moderated, and that in order to obtain a strong luminous output, it is fundamentally important to fabricate LEC devices with a designed thickness of the active layer. By systematic experimentation and simulation, we demonstrate that weak optical microcavity effects are prominent in a common LEC system, and that the luminance and efficiency, as well as the emission color and the angular intensity, vary in a periodic manner with the active-layer thickness. Importantly, we demonstrate that high-performance light-emission can be attained from LEC devices with a significant active-layer thickness of 300 nm, which implies that low-cost solution-processed LECs are indeed a realistic option, provided that the device structure has been appropriately designed from an optical perspective.

Place, publisher, year, edition, pages
Nature Publishing Group, 2018. Vol. 8, article id 6970
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Atom and Molecular Physics and Optics
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URN: urn:nbn:se:umu:diva-147802DOI: 10.1038/s41598-018-25287-xISI: 000431291500022PubMedID: 29725061OAI: oai:DiVA.org:umu-147802DiVA, id: diva2:1209356
Note

Publisher Correction: M. Lindh, P. Lundberg, T. Lanz, J. Mindemark, L. Edman. The Weak Microcavity as an Enabler for Bright and Fault-tolerant Light-emitting Electrochemical Cells. Scientific Reports. 2018;8 DOI: 10.1038/s41598-018-26760-3

Available from: 2018-05-22 Created: 2018-05-22 Last updated: 2018-07-18Bibliographically approved

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Lindh, E. MattiasLundberg, PetterLanz, ThomasMindemark, Jonas

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