Nazeeruddin, MohammadGraetzel, MichaelBaranoff, EtienneKessler, FlorianYum, Jun-hoYella, AswaniTsao, Hoi2015-09-222015-09-222015-09-222012https://infoscience.epfl.ch/handle/20.500.14299/118335The 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-con- taining 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)4]-) and a cationic metal complex functioning as redox-couple.patentJP6568142KR101957534EP2678346US10038150EP2678346US9779879JP2017168450CN103492402JP6092787CN103492401US9559321US2016233439JP2014517807JP2014513057US2014060641KR20140016298KR20140015398EP2678345CN103492402CN103492401EP2678346US2013330632EP2551949EP2511924WO2012114315WO2012114316EP249227744561393