Fig. 4: Lower Frenkel PL kinetics of film 1.
From: Parallel triplet formation pathways in a singlet fission material
a TGPL map of film 1 following photoexcitation at 2.1 eV with a pump fluence of ∼50 μJ/cm2. b Comparison of TGPL (integrated PL) and TA (averaged PIA) kinetics with different pump fluences. The time constants in the panel were obtained by fitting the 50 μJ/cm2 integrated PL kinetics (yellow line) with a multiexponential function. c Comparison of normalized PL spectra (light color—raw, dark color—smoothed) averaged over two different time regions (1–10 ps vs. 10–100 ps) in the data measured with 50 μJ/cm2. The inset shows the difference in peak positions between the two spectra.
