Zhao, XiaomingZhang, FeiYi, ChenyiBi, DongqinBi, XiangdongWei, PengLuo, JingshanLiu, XichengWang, ShirongLi, XianggaoZakeeruddin, Shaik MohammedGratzel, Michael2017-01-242017-01-242017-01-24201610.1039/c6ta05254ahttps://infoscience.epfl.ch/handle/20.500.14299/133396WOS:000387166900006A hole transport material ST1 was synthesized by a one-step Heck reaction. Compared to Spiro-OMeTAD, perovskite solar cells with ST1 exhibit a remarkable overall power conversion efficiency of 15.4% without the use of any dopants and additives, which is comparable to that of the devices based on doped Spiro-OMeTAD (16.3%) and present better stability during a four week aging test.text::journal::journal article::research article