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Self-absorption in a light-emitting electrochemical cell based on an ionic transition metal complex
Umeå University, Faculty of Science and Technology, Department of Physics.
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2015 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 106, no 10, 103502Article in journal (Refereed) Published
Abstract [en]

We report on the quantitative and qualitative effects of self-absorption in light-emitting electrochemical cells (LECs) based on ionic transition metal complexes (iTMCs), as measured in-situ during electric driving. A yellow-emitting iTMC-LEC comprising an active material thickness of 95 nm suffers a 4% loss of the emission intensity to self-absorption, whereas the same type of device but with a larger active-material thickness of 1 mu m will lose a significant 40% of the light intensity. We also find that the LEC-specific effect of doping-induced self-absorption can result in a drift of the emission spectrum with time for iTMC-LECs, but note that the overall magnitude of doping-induced self-absorption is much smaller than for conjugated-polymer LECs.

Place, publisher, year, edition, pages
2015. Vol. 106, no 10, 103502
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-102367DOI: 10.1063/1.4914307ISI: 000351397600060OAI: oai:DiVA.org:umu-102367DiVA: diva2:814897
Available from: 2015-05-28 Created: 2015-04-23 Last updated: 2017-12-04Bibliographically approved

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Kaihovirta, NikolaiEdman, Ludvig
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