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. 2015 Sep 29;5:14485. doi: 10.1038/srep14485

Figure 4. Time-resolved PL decays of perovskite CH3NH3PbI3 coated with different layers (red circles).

Figure 4

(a) spin-coated CH3NH3PbI3 perovskite film (390 nm); (b) film covered by PCBM; and (c) covered by Spiro-OMeTAD, excited at 517 nm, 90 nJ/cm2. The black and blue solid lines are the fits to the PL results by rate equation and one-dimensional diffusion model, respectively.