Table 2. PL characteristics and rate constants of TADF molecules.

TADF molecule	ΔEST [eV]	Total PL efficiency [%]	Φprompt [%]	Φdelayed [%]	τp [ns]	τd [μs]	[107 s−1]	[105 s−1]	kISC [107 s−1]	kRISC [105 s−1]
4CzIPN-Me	0.05	74	38	36	15	2.0	2.5	2.0	4.1	7.7
2CzPN	0.29a)	85	50	35	17	265	2.9	0.01	2.9	0.054

^a)The singlet and triplet energy levels of 2.95 eV and 2.66 eV were estimated from the onset of fluorescence and phosphorescence spectra, respectively.