Fig. 4: The effects of QWD on their carrier dynamics.

a, b Extracted a peak and b FWHM evolution from the broad bleach peak (425–470 nm) for the samples of D0P8, D4P4, and D8P0. c Schematic diagram of carrier behaviors after excitation. The carrier recombination progress can be divided into five stages: I, carrier formation; II, exciton transfer; III, charge transfer; IV, reverse charge transfer; V, continuous charge transfer and recombination. d Contribution of each domain in the CsPbClBr₂ nanocrystal films as estimated from the TA spectra.