Fig. 18. AFM pictures of perovskite absorber (CH3NH3PbI3−xBrx) (a) prepared on PEDOT:PSS film, (b) after fabrication of PCBM, and (c) PDI film on PEDOT:PSS/perovskite thin layer. (d) J–V curves, (e) PDI molecular assembly, and (f) EQE-wavelength findings for both PCBM and PDI ETL-based PSCs (reproduced with permission from ref. 164. Copyright 2017 Elsevier).
