Table 1 Relative permittivities (εr) of all host materials, LUMO energy offsets (ΔELUMO), and intermolecular CT singlet states (ΔELE-CT) between donors and acceptors

From: Blue organic long-persistent luminescence via upconversion from charge-transfer to locally excited singlet state

Hosts

εr

ΔELUMO (eV)

ΔELE-CT (eV)

DTAPC

DAAPC

AAPC

DDATA

DTAPC

DAAPC

AAPC

DDATA

ZEONOR

2.3

–

–

–

–

–

–

–

–

PMMA

3.3

–

–

–

–

–

–

–

–

DPEPO

4.1

0.07

0.09

0.16

0.49

-0.09

-0.04

0.00

0.30

2-PPT

3.8

0.17

0.19

0.26

0.59

0.02

0.07

0.10

0.40

2,8-PPT

6.3

0.33

0.35

0.42

0.75

0.17

0.23

0.26

0.56

4,6-PPT

6.8

0.42

0.44

0.51

0.84

0.26

0.31

0.35

0.65

3,7-PPT

6.7

0.65

0.67

0.74

1.07

0.49

0.54

0.58

0.88

  1. ΔELE–CT was calculated from ΔELUMO and \({E}_{{{{\rm{S}}}}1}^{{{{\rm{b}}}}}\) (Supplementary Table 3). The light (1LE emission), medium (mixture emission of 1LE and 1CT), and darkest (1CT) gray shading indicate the dominant emission processes in the PL at room temperature.
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