A Novel Oligomer as a Hole Transporting Material for Efficient Perovskite Solar Cells

Peng Qin, Nicolas Tetreault, M. Ibrahim Dar, Peng Gao, Keri L. McCall, Simon R. Rutter, Simon D. Ogier, Neil D. Forrest, James S. Bissett, Michael J. Simms, Aaron J. Page, Raymond Fisher, Michael Grätzel, Mohammad Khaja Nazeeruddin