Fig. 2: Spin-dependent luminescence.
From: High-spin state dynamics and quintet-mediated emission in intramolecular singlet fission
a ODMR spectra (blue) including simulation (red) for (DPH)2, Me-(DPH)3, and (DPH)3. Whilst the trimers show involvement of both quintet (red filled) and triplet (green filled) in the luminescence, the dimer only reveals quintets. Performed at T = 80 K and λ = 365 nm. b Temperature dependent PL decay of Me-(DPH)3, exhibiting long time delayed fluorescence. Performed at λ = 355 nm. c Integrated PL from (b), revealing virtually all luminescence decayed by 2 µs. d Time-dependent magnetic-field dependent PL of Me-(DPH)3. The spin-dependent luminescence starts at 40 ns, reaching a maximum at 100–300 ns. Performed at λ = 375 nm and T = 80 K (temperature dependence in Supplementary Fig. 9, full PL spectra in Supplementary Fig. 10).
