An asymmetric A-π-D-π-D-π-A′ tribranched organic dye (dye1) with cyanoacrylic acid and indolinum carboxyl acid as electron acceptors and triphenylamine as an electron donor was designed and theoretically investigated for dye-sensitized solar cells (DSSCs). Dye1 was compared to reference well-known dyes with single electron acceptors (D5 and JYL-SQ6). Density functional theory and time-dependent density functional theory calculations were used to estimate the photovoltaic properties of the dyes. Due to the different lowest unoccupied molecular orbital levels of each acceptor and the energy antenna of the dual electron donor (D-π-D), the absorption spectra of the branches displayed different shapes. If the overall properties are considered, the asymmetric A-π-D-π-D-π-A′ tribranched organic dye exhibited a high conversion efficiency performance for DSSCs. The findings of this work suggest that optimizing the branch of electron donors and acceptors in dye sensitizers based on asymmetric A-π-D-π-D-π-A′ tribranched organic dye produces good photovoltaic properties for DSSCs.
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Lee, G.H., Kim, Y.S. Theoretical study of an asymmetric A-π-D-π-D-π-A′ tribranched organic sensitizer for dye-sensitized solar cells. Journal of the Korean Physical Society 69, 381–385 (2016). https://doi.org/10.3938/jkps.69.381
- Dye-sensitized solar cells (DSSCs)