Fig. 4.

Hot-electron transfer (HET) dynamics in Ag–CsPbBr₃ nanocrystals (NCs). a TA spectra normalized to the signal amplitude at 514 nm recorded at a time delay of ~0.5 ps from CsPbBr₃ and Ag–CsPbBr₃ NCs, respectively. The pump wavelength is 420 nm. b PL excitation spectra recorded from CsPbBr₃ and Ag–CsPbBr₃ NCs. The spectra are normalized to the PL intensity under 470 nm excitation. c Kinetic curves probed at 514 nm recorded from CsPbBr₃ and Ag–CsPbBr₃ NCs pumped at the wavelengths of 420 and 470 nm, respectively. The curves are plotted normalized to the signal amplitude recorded at a delay of 2 ns. d Scaled kinetics of carrier transfer from Ag to CsPbBr₃ NCs in hybrid NCs obtained by subtracting the contribution of CsPbBr₃ from that of Ag–CsPbBr₃ NCs, whereas the signals for the two samples are normalized to the amplitude at a time delay of 2 ns. The solid line is the curve fitted to a biexponential growth function