Red Light-Emitting Electrochemical Cells Employing Pyridazine-Bridged Cationic Diiridium Complexes

La-Placa, Maria-Grazia, Igual-Muñoz, Ana María, Romero, Jorge, Daniels, Ruth E., Kozhevnikov, Valery, Sessolo, Michele and Bolink, Henk J. (2019) Red Light-Emitting Electrochemical Cells Employing Pyridazine-Bridged Cationic Diiridium Complexes. ECS Journal of Solid State Science and Technology, 8 (6). R84-R87. ISSN 2162-8769

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A rigid dinuclear Ir(III) complex showing high photoluminescence quantum yield in pure films was successfully used to fabricate light-emitting electrochemical cells with and without ionic liquid additives. The devices showed nearly instantaneous electroluminescence after biasing and maximum quantum yield approaching 1%. The lifetime of the devices was found to be limited to approximately 20 hours, which we correlated with the irreversible oxidation of the complex as seen from electrochemical measurements. This work validates the use of highly luminescent dinuclear iridium complexes in light-emitting electrochemical cells. Future studies will pursue materials with more efficient photoluminescence as well as improved electrochemical stability.

Item Type: Article
Uncontrolled Keywords: Luminescence, Optoelectronics, electroluminescence, light-emitting diode, luminescence
Subjects: F100 Chemistry
F200 Materials Science
Department: Faculties > Health and Life Sciences > Applied Sciences
Depositing User: Elena Carlaw
Date Deposited: 05 Jul 2019 14:20
Last Modified: 10 Oct 2019 17:19

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