Figure 6: Fluorescence lifetime.
From: An insight into non-emissive excited states in conjugated polymers

Fluorescence decay dynamics at 720 nm of P3HT triblock in high dielectric (toluene/methanol=50/50 vol.%) and low dielectric (toluene/hexane=15/85 vol.%) solvent mixtures. The instrument response function (prompt) is obtained at 639 nm (excitation wavelength) using Ludox suspension.