Table 5 Contribution of donor and acceptor in exciting HOMOs and LUMOs of the respective R and DD1–DD8 molecules.

From: Designing of pyrrolopyrazine-based electron transporting materials with architecture (A1-D-A2) in perovskite solar cells: a DFT study

Molecule

Orbital

%age contribution of acceptor 1 (eV)

%age contribution of donor (eV)

%age contribution of acceptor 2 (eV)

R

HOMO

5.3

94.7

LUMO

40.5

59.5

DD1

HOMO

3.9

77.3

18.8

LUMO

0.0

21.6

78.4

DD2

HOMO

3.3

77.3

19.5

LUMO

0.0

22.3

77.7

DD3

HOMO

5.3

76.9

17.8

LUMO

0.0

21.5

78.5

DD4

HOMO

1.5

70.1

28.4

LUMO

0.0

28.2

71.8

DD5

HOMO

3.9

78.4

17.8

LUMO

0.0

44.8

55.2

DD6

HOMO

3.2

81.8

15.0

LUMO

0.0

36.4

63.6

DD7

HOMO

1.9

77.3

20.8

LUMO

0.0

38.3

61.7

DD8

HOMO

2.2

81.5

16.3

LUMO

0.0

31.0

69.0