Operating modes of sandwiched light-emitting electrochemical cells
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http://dx.doi.org/10.1002/adfm.201002587 |
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Títol
Operating modes of sandwiched light-emitting electrochemical cellsAutoria
Data de publicació
2011-03-14Editor
WileyISSN
1616-3028Cita bibliogràfica
Advanced functional materials, 2011, May, V. 21 (9)Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://onlinelibrary.wiley.com/doi/10.1002/adfm.201002587/abstractVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Light-emitting electrochemical cells (LECs) are promising lighting devices in which the redistribution of ionic charges allows for double electronic carrier injection from air-stable electrodes. Uncertainties about ... [+]
Light-emitting electrochemical cells (LECs) are promising lighting devices in which the redistribution of ionic charges allows for double electronic carrier injection from air-stable electrodes. Uncertainties about the mode of operation are limiting the progress of these devices. Using fast (with respect to the current growth time) but resolutive electrical measurement techniques, the electronic transport mechanism in state-of-the-art sandwiched devices can be monitored as a function of the operation time. The results indicate the formation of doped transport layers adjacent to the electrodes that reduces the extent of the central neutral light-emitting layer where electronic transport is limited by space-charge. Prolonged growth of the doped regions beyond that required for efficient injection should be prevented, as this decreases the efficiency and leads to low luminance devices. [-]
Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
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