期刊
APPLIED PHYSICS LETTERS
卷 106, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4914307
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资金
- Swedish Foundation for Strategic Research
- Vetenskapsradet
- Energimyndigheten
- Kempestiftelserna
- Carl Trygger's Foundation
- Umea University
- Knut and Alice Wallenberg Foundation
- European Union [316906]
- Spanish Ministry of Economy and Competitiveness (MINECO) [MAT2011-24594]
- Generalitat Valenciana [Prometeo/2012/053]
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. (C) 2015 AIP Publishing LLC.
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