Article,

Improvement of Photovoltaic Performance by Substituent Effect of Donor and Acceptor Structure of Tpa-Based Dye-Sensitized Solar Cells

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Journal of Molecular Modeling, (2016)
DOI: 10.1007/s00894-015-2893-9

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.

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