Spectroscopic studies of coumarin-343 as dye sensitized solar cells based on density functional theory calculations

Dye sensitized solar cell (DSSC) is a low-cost solar cell belonging to the group of thin filmsolar cells with the properties of cheapness and relatively high efficiency. In DSSC, organicdye molecules play a key role since they determine both the efficiencies of photo absorptionand charge injection into semiconductors [1, 2]. Stable ground states and pure electronicabsorption spectra of coumarin derivatives in gas phase and in solution have been studied byusing quantum chemical methods. To fully understand the photo-absorption of Coumarin-343in different environments, we investigate the spectroscopic spectrum in both gas phase andsolution.