Table 1 TADF characteristics of the investigated compounds

From: Enhancing operational stability of OLEDs based on subatomic modified thermally activated delayed fluorescence compounds

Compound

ΦPL (%)a

Φp (%)b

Φd (%)

τp (ns)/τd (μs)c

kpf (107 s−1)d

kdf (104 s−1)e

kISC (107 s−1)f

kRISC (104 s−1)g

DPA-BO

89.0

68.9

20.0

3.5/67.2

19.6

0.3

4.4

0.4

d-DPA-BO

88.3

67.1

21.1

3.4/56.8

19.2

0.3

4.6

0.4

DPA-d-BO

89.3

63.9

25.4

3.4/64.1

18.7

0.4

5.3

0.6

d-DPA-d-BO

90.2

68.8

21.4

3.4/59.5

20.1

0.4

4.8

0.5

  1. aAbsolute PLQYs evaluated under N2 of 10 wt% DPEPO thin film (298 K).
  2. bAbsolute PLQYs evaluated under air of 10 wt% DPEPO thin film (298 K).
  3. cPL lifetimes of prompt (τp) and delayed (τd) decay components in 10 wt% DPEPO thin film (298 K).
  4. dkpf, prompt fluorescence rate constant59.
  5. ekdf, delayed fluorescence rate constant59.
  6. fkISC, intersystem crossing rate constant59.
  7. gkRISC, reverse intersystem crossing rate constant59.
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