Department of Chemistry , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan.
Electronics Materials and New Energy , Mitsubishi Chemical Corporation, Yokohama R&D Center 1000 , Kamoshida-cho, Aoba-ku, Yokohama 227-8502 , Japan.
J Am Chem Soc. 2018 Apr 18;140(15):5018-5022. doi: 10.1021/jacs.8b01783. Epub 2018 Apr 6.
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- b:4,5- b']dipyrrole bearing two racemic alkanediylsulfonate anion side chains (BDPSOs) serves as a neutral, nonhygroscopic, dopant-free HTM for lead perovskite (MAPbI) 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, 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.
空穴传输材料（HTM）是有机电子器件中不可或缺的组成部分，通常包含施主/掺杂剂组合。我们报告了一种取代的苯并[1,2-b:4,5-b']二吡咯的二钠盐，其带有两个手性的烷二基磺酸盐阴离子侧链（BDPSOs），可用作铅卤钙钛矿（MAPbI）太阳能电池的中性、非吸湿性、无掺杂 HTM。这些有机/无机杂化分子对于可调轨道能级和可控溶解性很有用。氟化的 BDPSO 能级与 MAPbI 匹配，形成倒置结构太阳能电池，其效率为 17.2%，滞后最小。使用 BDPSO 制造的太阳能电池器件表现出显著的存储和操作稳定性。
