Fig. 3. Electron transfer from CsPbBr₃ nanoplatelets to perylene diimide chromophores upon exciting at 400 nm.

a Transient absorption (TA) spectrum of CsPbBr₃ NPLs. The inset shows the 465–850 nm spectral range. b TA spectrum of CsPbBr₃ NPLs + PDI hybrid. The inset shows the 465–850 nm spectral range, showing the spectral features of the PDI anion (PDI⁻). c Comparison of temporal dynamics of main exciton bleach of CsPbBr₃ NPLs (~449 nm), the main exciton bleach of CsPbBr₃ NPLs + PDI hybrid exciton bleach (453 nm) and the PDI anion (PDI⁻) photoinduced absorption growth (~760 nm). Solid lines represent the experimental data while dotted lines are the result of the target global analysis. d Kinetic model used for the target global analysis for electron transfer (ET) from NPLs to the PDI molecules in CsPbBr₃ NPLs + PDI hybrid (for details, see Supplementary Note 3).