Disodium Benzodipyrrole Sulfonate as Neutral Hole-Transporting Materials for Perovskite Solar Cells
2018-04-06T17:05:21Z (GMT)
by
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 (MAPbI3) 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 MAPbI3, 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.
Categories
License
CC BY-NC 4.0