Table 1 The photophysical and electrochemical properties of DBA-DmICz and DBA-DTMCz

From: Efficient pure blue hyperfluorescence devices utilizing quadrupolar donor-acceptor-donor type of thermally activated delayed fluorescence sensitizers

 

λabs (nm)a

λRTPL (nm)b

FWHM (nm)b

S1 (eV)c

T1 (eV)d

ΔEST (eV)e

τp (ns)f

\({{\tau }}\)d (µs)f

HOMO (eV)g

LUMO (eV)h

PLQYi

DBA-DmICz

394

448

58

3.08

2.96

0.12

37.3

1.94

5.85

2.87

0.95

DBA-DTMCz

390

455

53

3.02

3.00

0.02

36.0

0.92

5.82

2.89

0.99

  1. aUV-Vis absorption wavelengths measured in 10−5 M of toluene solution. bThe maximum photoluminescence emission measured in toluene at 300 K. cCalculated by the onset of PL spectrum in toluene at 300 K. dCalculated by the onset of phosphorescence spectrum in toluene at 77 K with 30 ms of delaying. eΔEST = S1–T1. fPrompt and delayed lifetime in 30% doped DBFPO film. gHOMO level energy measured by cyclic voltammetry (CV) method. hLUMO = HOMO-optical band gap. iThe absolute PLQY value measured in 30% doped DBFPO film.
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