Rational design of dyes for pivotical Gratzel cells is solidly based on knowledge of structural electronic factors defining experimentally observed spectra. The current work applies time-dependent density functional theory approach to evaluate the potential usefulness of 3-amino-3-(pyperidine-1-yl)arylazoacrylonitriles as sensibilizers for dye-sensitized solar cells. The energy of electron transitions observed in UV-Vis spectra for arylazoamidines strongly depends on electronic structure of substituent in aromatic ring and, thus, describes compounds which can be possibly used as sensibilizing reagents for Gratzel's solar cells.