Fig. 2: Transient photoluminescence studies of 4CzIPN and TTM-3PCz with 355 nm excitation. | Nature Communications

Fig. 2: Transient photoluminescence studies of 4CzIPN and TTM-3PCz with 355 nm excitation.

From: Singlet and triplet to doublet energy transfer: improving organic light-emitting diodes with radicals

Fig. 2

a PL timeslices at 2.5 ns for 4CzIPN:TTM-3PCz:CBP (ratio = 0.25:0.03:0.72, red line); 4CzIPN:CBP (0.25:0.75, black line); TTM-3PCz:CBP (0.03:0.97, blue line), showing emission from both TADF and radical in the combined film. b PL timeslices for 4CzIPN:TTM-3PCz:CBP at various times from 2.5 to 50 ns, showing the 4CzIPN emission decaying relative to the radical emission at longer times. c Integrated PL fraction time profiles from 2.5 ns to 25 µs for 4CzIPN:TTM-3PCz:CBP in 650–840 nm range (red line); 4CzIPN:CBP in 450–800 nm range (black line); and TTM-3PCz:CBP in 575–840 nm range (blue line), showing faster luminescence for the combined TADF:radical film than the TADF-only film.

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