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Perovskite Solar Cells Based on Oligotriarylamine Hexaarylbenzene as Hole-Transporting Materials

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journal contribution
posted on 22.04.2019, 11:04 by Mona Shasti, Sebastian F. Völker, Silvia Collavini, Silvia Valero, Fernando Ruipérez, Abdollah Mortezaali, Shaik. M. Zakeeruddin, M. Grätzel, A. Hagfeldt, Juan Luis Delgado
A 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.