Extended Data Fig. 4: J–V data for a solar cell with a pristine spiro-OMeTAD:LiTFSI HTL before and after air exposure.
From: CO2 doping of organic interlayers for perovskite solar cells

a–e, J–V curves of the solar cell upon exposure to air for 0 min (a), 10 min (b), 30 min (c), 60 min (d) and 120 min (e).