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Thin-film emission data of TCATPB (gray) in PMMA covered with Exceval as well as P840 (blue) and P400 (orange) embedded in Exceval in the ambient atmosphere at an excitation wavelength of λexc = 365 nm. (a) Prompt emission showing both fluorescence and phosphorescence. The inset shows delayed spectra showing the phosphorescence only. (b) Corresponding phosphorescence decays with τPhos = 575 ms (TCATPB), 585 ms (P840), and 610 ms (P400).
