So I have the PL spectra and lifetime transients for a fluorophore in solution (Perylene based polymer in Chloroform) and so by fitting the transients I am able to extract 2 lifetimes one attributed to the perylene emission and one to the excimer that is formed in the solution. I also have the quantum yield for it. The question is how can I calculate the decay rates for each individual species since I have 2 lifetimes and I can't use the simple Q=tau*K equation. I also have the lifetime and rates for the perylene monomer in solution, will this be of any help ?
This paper by Birks might answer your questions
https://www.jstor.org/stable/2414496?seq=1#page_scan_tab_contents
Good morning Hazem, if the software you use for generating the time dependent photoluminescence decay curves has an option for measuring multiple exponential lifetimes (i.e. biexponential curve fitting and deconvolution), that will give you two lifetimes. I recommend trying that. The software that I used in graduate school for measuring fluorescence lifetimes was called FeliX 32 and that has options for measuring single and multi exponential lifetimes (2-4, respectively). Best Chris
1. There must be a difference in decay rates as a function of wavelength when this decay is that of monomer and dimer
2. The dimer emission will grow in with the decay time of the monomer: there cannot be a simple bi-exponential decay?
Thanks Christopher, unfortunately it doesn't I only capture the data and analyse it externally. But now that I have the 2 lifetimes I still face the problem of calculating the individual decay rates for each component.
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