Figure 3

(a) PL spectra under low-intensity cw excitation (less than 1 mW/cm²). Inset: PLQY of the composites films. (b) Photoluminescence quantum yield (excitation wavelength 532 nm) as a function of the excitation density. (c) Temporal decays of PL measured at low excitation fluence. (d) PL lifetime (defined as 1/e decay time) extracted from photoluminescence decays as a function of the laser pulse fluence, present in log-log scale; the dotted line shows a linear dependence. (e) Instantaneous photoluminescence intensity PL₀ measured as a function of laser pulses fluence and presented in log-log scale; the dotted line shows a quadratic dependence.