Extended Data Fig. 8: TOF-SIMS depth profiles.
From: CO2 doping of organic interlayers for perovskite solar cells
a–c, Solar cells with a pristine spiro-OMeTAD:LiTFSI HTL (a), a spiro-OMeTAD:LiTFSI:Co(III)TFSI HTL (b) and a CO2-treated spiro-OMeTAD:LiTFSI HTL (c).
