The Highest Occupied Molecular Orbital (HOMO) - The Lowest Unoccupied Molecular Orbital (LUMO) of the dyes and their wavelength absorption.

Table 1: The Highest Occupied Molecular Orbital (HOMO) - The Lowest Unoccupied Molecular Orbital (LUMO) of the dyes and their wavelength absorption.

E_HOMO

(V, vs Fc)

E_LUMO

(V, vs Fc)

λ_max(nm)

The HOMO-LUMO band gap (nm)

MC20

0.31

-1.64

324

195

MC28

0.33

-1.44

354

177