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White Light from a Single-Emitter Light-Emitting Electrochemical Cell
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2013 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 135, no 9, 3647-3652 p.Article in journal (Refereed) Published
Abstract [en]

We report a novel and generic approach for attaining white light from a single-emitter light-emitting electrochemical cell (LEC). With an active-layer comprising a multifluorophoric conjugated copolymer (MCP) and an electrolyte designed to inhibit MCP energy-transfer interactions during LEC operation, we are able to demonstrate LECs that emit broad-band white light with a color rendering index of 82, a correlated-color temperature of 4000 K, and a current conversion efficacy of 3.8 cd/A. It is notable that this single-emitter LEC configuration eliminates color-drift problems stemming from phase separation, which are commonly observed in conventional blended multiemitter devices. Moreover, the key role of the electrolyte in limiting undesired energy-transfer reactions is highlighted by the observation that an electrolyte-free organic light-emitting diode comprising the same MCP emits red light.

Place, publisher, year, edition, pages
2013. Vol. 135, no 9, 3647-3652 p.
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-68910DOI: 10.1021/ja312548bISI: 000315936700055OAI: oai:DiVA.org:umu-68910DiVA: diva2:621613
Available from: 2013-05-16 Created: 2013-04-29 Last updated: 2017-12-06Bibliographically approved

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Tang, ShiEdman, Ludvig

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