Abstract
We report a computational study of a series of organic dyes built with triphenylamine (TPA) as an electron donor group. We designed a set of six dyes called (TPA-n, where n=0-5). In order to enhance the electron-injection process, the electron-donor effect of some specific substituent was studied. Thus, we gave insights into the rational design of organic TPA-based chromophores for use in dye-sensitized solar cells (DSSCs). In addition, we report the HOMO, LUMO, the calculated excited state oxidized potential E-dye*(eV) and the free energy change for electron-injection Delta G(inject)(eV), and the UV-visible absorption bands for TPA-n dyes by a time-dependent density functional theory (TDDFT) procedure at the B3LYP and CAM-B3LYP levels with solvent effect. The results demonstrate that the introduction of the electron-acceptor groups produces an intramolecular charge transfer showing a shift of the absorption wavelengths of TPA-n under studies.
- absorption
- alignment,
- approximation,
- cells,
- density
- design,
- dqcauchile
- dye-sensitized
- electron-transfer,
- electronic
- energy-levels,
- free
- functional
- molecular
- organic
- organic-dyes,
- porphyrins,
- semiconductor,
- solar
- spectra,
- surface
- theory,
- tio2,
Users
Please
log in to take part in the discussion (add own reviews or comments).