Shasti, MonaVolker, Sebastian F.Collavini, SilviaValero, SilviaRuiperez, FernandoMortezaali, AbdollahZakeeruddin, Shaik M.Gratzel, M.Hagfeldt, A.Luis Delgado, Juan2019-06-182019-06-182019-06-182019-05-0310.1021/acs.orglett.9b00988https://infoscience.epfl.ch/handle/20.500.14299/157677WOS:000467320000061A cobalt-catalyzed cyclotrimerization of bis(aryl)alkyne is used as an innovative tool to obtain hole-transport materials (HTMs). The novel HTM containing six units of oligotriarylamine (HAB1), characterized by UV-vis, cyclic voltammetry, DFT, and thermogravimetric analysis, confirms its suitability as an efficient HTM in PSCs. A PCE of 17.5% was obtained in HAB1-containing PSCs, a performance comparable to that obtained with spiro-OMeTAD and with slightly better thermal stability.Chemistry, OrganicChemistryelectrochemical propertiesefficiencytext::journal::journal article::research article