Figure 5.

Absorption and PL spectra (a) and resonant Raman spectra (b) of CH₃NH₃PbI₃ deposited on flat substrates and in mesoporous substrates. Clearly the optical properties of the material depend sensitively on the material's structure, which is determined in part by the substrate on which it is deposited. Solid lines in (b) are the sums of the individual peaks (dotted lines) used to fit the spectra. The figure is reproduced with permission from Ref. 52. Copyright 2014, American Chemical Society.