Figure 5.

(a) TRPL kinetics of Y6 film at indicated excitation fluence after photoexcitation at 775 nm. (b) TA kinetics of Y6 film at a probe wavelength of 870 nm after photoexcitation at 700 nm; the excitation was 2 × 10¹⁵ photons cm⁻². The solid lines after fitting curves using exponential decay functions; the fitting parameters can be found in supporting information (Tables S6 and S7).