a Experimental absorption spectrum of CH3NH3PbBr3 single crystals for the excitation densities of 5, 7.5 and 10 × 1018 cm−3 at 1 ps. Similar trends can be observed at any time delay between 500 fs and several ps. b Theoretical absorption spectra of CH3NH3PbBr3 in the presence of increasing carrier densities, as calculated with the SBE. The black arrow indicates the excitonic enhancement of the above-gap absorption associated with the presence of e–h correlations in the highly photoexcited material. In both cases, the Wannier bound exciton peak persists above nM.