Disodium Benzodipyrrole Sulfonate as Neutral Hole-Transporting Materials for Perovskite Solar Cells Rui Shang Zhongmin Zhou Hiroki Nishioka Henry Halim Shunsuke Furukawa Izuru Takei Naoya Ninomiya Eiichi Nakamura 10.1021/jacs.8b01783.s001 https://acs.figshare.com/articles/journal_contribution/Disodium_Benzodipyrrole_Sulfonate_as_Neutral_Hole-Transporting_Materials_for_Perovskite_Solar_Cells/6107006 Hole-transporting material (HTM) is an indispensable constituent in organic electronic devices, generally comprising a donor/dopant combination. We report that a disodium salt of substituted benzo­[1,2-<i>b</i>:4,5-<i>b</i>′]­dipyrrole bearing two racemic alkanediylsulfonate anion side chains (BDPSOs) serves as a neutral, nonhygroscopic, dopant-free HTM for lead perovskite (MAPbI<sub>3</sub>) solar cells. These organic/inorganic hybrid molecules are useful for tunable orbital level and controllable solubility. A fluorinated BDPSO has an energy level matched with MAPbI<sub>3</sub>, affording an inverted-structure solar cell that performs with 17.2% efficiency with minimal hysteresis. The solar cell devices fabricated using BDPSOs showed remarkable storage and operational stability. 2018-04-06 17:05:21 Perovskite Solar Cells Hole-transporting material device Disodium Benzodipyrrole Sulfonate racemic alkanediylsulfonate anion side chains MAPbI 3 Neutral Hole-Transporting Materials HTM BDPSO