Self-absorption in a light-emitting electrochemical cell based on an ionic transition metal complex

Nikolai Kaihovirta; Giulia Longo; Lidón Gil-Escrig; Henk J. Bolink; Ludvig Edman

doi:10.1063/1.4914307

Self-absorption in a light-emitting electrochemical cell based on an ionic transition metal complex

Nikolai Kaihovirta, Giulia Longo, Lidón Gil-Escrig, Henk J. Bolink, Ludvig Edman^*

^*Corresponding author for this work

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Abstract

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 μm 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.

Original language	English
Article number	103502
Journal	Applied Physics Letters
Volume	106
Issue number	10
DOIs	https://doi.org/10.1063/1.4914307
Publication status	Published - 9 Mar 2015
Externally published	Yes

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title = "Self-absorption in a light-emitting electrochemical cell based on an ionic transition metal complex",

abstract = "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 μm 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.",

author = "Nikolai Kaihovirta and Giulia Longo and Lid{\'o}n Gil-Escrig and Bolink, {Henk J.} and Ludvig Edman",

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AU - Bolink, Henk J.

AU - Edman, Ludvig

N1 - N.K. and L.E. acknowledge the Swedish Foundation for Strategic Research, Vetenskapsrådet, Energimyndigheten, Kempestiftelserna, Carl Trygger′s Foundation and Umeå University for financial support. L.E. is a Royal Swedish Academy of Sciences Research Fellow supported by a grant from the Knut and Alice Wallenberg Foundation. The Valencian team acknowledge support from the European Union 7th framework program LUMINET (Grant No. 316906), the Spanish Ministry of Economy and Competitiveness (MINECO) (MAT2011-24594) and the Generalitat Valenciana (Prometeo/2012/053).

PY - 2015/3/9

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N2 - 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 μm 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.

AB - 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 μm 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.

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Self-absorption in a light-emitting electrochemical cell based on an ionic transition metal complex

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