Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 14, Issue 31, Pages 10886-10890Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2cp41323j
Keywords
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Funding
- European Union (CELLO) [STREP 248043]
- Spanish Ministry of Economy and Competitivity (MINECOM) [MAT2007-61584, MAT2011-24594, CSD2007-00010]
- Generalitat Valenciana [ACOMP/2012/185]
- FPU of the Spanish Ministry of Education, Culture, and Sport (MECD)
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Photoluminescence spectroscopy has been performed in situ during device operation and after switch-off on ionic transition metal complex (iTMC)-based sandwich-type light-emitting electrochemical cells (LECs). It is demonstrated that the photoluminescence of the LECs decreases with increasing operating time. For operating times up to three hours the decline in photoluminescence is fully recoverable after switching off the bias. These results imply that doping of the iTMC layer is responsible, not only, for the turn-on of LECs but also for their lifetimes.
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