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A ruthenium tetrazole complex-based high efficiency near infrared light electrochemical cell

Abstract

We report on the exploitation of a new tetrazole-substituted 1,10-phenanthroline and a 2,2'-bipyridine(bpy) ancillary ligand modified by an electron-donating group in cationic ruthenium complexes. This complex, placed in between two electrodes without any polymer, demonstrates high efficiency near-infrared (NIR) electroluminescence (EL). The comparison between bpy and its methyl-substituted ancillary ligand shows that the cationic Ru tetrazolate complex containing methyl groups exhibits a red shift in EL wavelength from 620 to 800 nm compared to [Ru(bpy)3]2+and an almost twofold reduction of turn-on voltage, i.e., from 5 to 3 V, with respect to 5-tetrazole-1,10-phenanthroline. We achieved an external quantum efficiency value of 0.95% for the dimethyl derivative, which is a remarkable result for non-doped NIR light electrochemical cells based on ruthenium polypyridyl.

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Publication details

The article was received on 17 Apr 2017, accepted on 10 May 2017 and first published on 10 May 2017


Article type: Communication
DOI: 10.1039/C7CC02878D
Citation: Chem. Commun., 2017, Accepted Manuscript
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    A ruthenium tetrazole complex-based high efficiency near infrared light electrochemical cell

    H. Shahroosvand, S. Abaspour, B. Pashaei, E. Radicchi, F. De Angelis and F. Bonaccorso, Chem. Commun., 2017, Accepted Manuscript , DOI: 10.1039/C7CC02878D

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