Fig. 5.

Time-resolved photoluminescence spectra of CH₃NH₃PbBr₃ single crystals. a 2D spectral map, b shift of the peak centre position with time. c Numerical evaluation of Eq. (2) for three decays extracted from Supplementary Fig. 7. The initial carrier densities are indicated on the Figure. Parameters: µ _n = 10 cm² V⁻¹ s⁻¹, µ _p = 50 cm² V⁻¹ s⁻¹, k ₂ = 1×10⁻¹⁰ cm³ s⁻¹, k _1,n = 9×10⁵ s⁻¹, k _1,p = 1×10³ s⁻¹. See details of simulation in the Supplementary Discussion