Extended Data Fig. 7: TOF-SIMS 2D elemental mapping for Li ion. | Nature

Extended Data Fig. 7: TOF-SIMS 2D elemental mapping for Li ion.

From: CO2 doping of organic interlayers for perovskite solar cells

Extended Data Fig. 7

Green dots represent Li ions. The scale bar for the Li ion signal intensity in each map was adjusted for the best viewing level. a, The density of Li ions is high, forming clusters in the pristine spiro-OMeTAD:LiTFSI film. b, There are few Li ions in the CO2-treated spiro-OMeTAD:LiTFSI film, because Li2CO3 precipitate (the doping by-product) was filtered out before film fabrication.

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