Qin, PengTetreault, NicolasDar, M. IbrahimGao, PengMccall, Keri L.Rutter, Simon R.Ogier, Simon D.Forrest, Neil D.Bissett, James S.Simms, Michael J.Page, Aaron J.Fisher, RaymondGraetzel, MichaelNazeeruddin, Mohammad Khaja2015-05-292015-05-292015-05-29201510.1002/aenm.201400980https://infoscience.epfl.ch/handle/20.500.14299/114708WOS:000348772600008(Figure Presented) A polytriarylamine-based oligomer is reported as a hole transporting material and its application in solid-state CH3NH3PbI3 based heterojunction solar cells is described. It yields a power conversion efficiency of 12.0% under 99.6 mW cm-2 illumination. In addition to suitable energy levels and high hole mobility, the low preparation cost makes it a promising candidate for photovoltaics. © 2014 Wiley-VCH Verlag GmbH & Co. KYWGaA.perovskite solar cellsoligomershole transporting materialsTiO2 scaffoldspower conversion efficiencytext::journal::journal article::research article