Ecole Polytechnique Federale De Lausanne

Jun-Ho Yum

Michael Graetzel

Mohammad Khaja Nazeeruddin

Shaik Mohammad Zakeeruddin

Florian Kessler

Etienne Baranoff

Aswani Yella

Hoi Nok Tsao

The present invention provides an improved redox couple for electrochemical and optoelectronic devices. The redox couple is based on a complex of a first row transition metal, said complex containing at least one mono-, bi-, or tridentate ligand comprising a substituted or unsubstituted ring or ring system comprising a five-membered N-containing heteroring and/or a six-membered ring comprising at least two heteroatoms, at least one of which being a nitrogen atom, said five- or six-membered heteroring, respectively, comprising at least one double bond. The invention also relates to electrolytes and to the devices containing the complex, and to the use of the complex as a redox couple. The invention further provides electrochemical and/or optoelectronic devices comprising a first and a second electrode and, between said first and second electrode, a charge transport layer, said a charge transport layer comprising tetracyanoborate ([B(CN)]) and a cationic metal complex functioning as redox-couple.

Redox couple for electrochemical and optoelectronic devices

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Préverenges, Switzerland

Jun-Ho Yum