In this work, the newly designed phenothiazine based organic dye (PT-BTBA, PT-EBTBA and PT-EBTEBA) derivatives were screened and investigated for dye-sensitized solar cells (DSSCs) application. The literature dye of SB covers the electron-donor (D) in phenothiazine and cyanoacrylic acid in electron-acceptor (A) based on D-A structure. In order to improving the π-conjugation and acceptor effects on the SB dye were investigated. The effect of D-π-A designed dyes on the optical absorption spectra and photovoltaic (PV) parameters were implemented by the density functional theory (DFT) and time‐dependent DFT (TD-DFT) calculations. Also, the hybrid functionals were initially evaluated to establish an accurate methodology for calculating the first-singlet absorption peak of SB dye. Consequently, TD-CAM-B3LYP functional and 6-311++G(d,p) theory were well match with the literature data. According to this result, phenothiazine-4-((7-ethynylbenzo[c][1,2,5]thiadiazol-4-yl)ethynyl)benzoic acid (PT-EBTEBA) dye has the strong group for more red-shifted and successfully electron inject into TiO2 surface. It is expected to provide some theoretical guidance on designing photosensitive with new metal-free organic dyes for use in DSSCs yielding highly efficient performance.
Research Article
Quantum Chemical Investigation on D-π-A Based Phenothiazine Organic Chromophores with Spacer and Electron Acceptor Effect for DSSCs
https://doi.org/10.21203/rs.3.rs-259041/v1
This work is licensed under a CC BY 4.0 License
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D-π-A Configuration
DFT and TD-DFT Calculations
CAM-B3LYP Functional
Electronic and Absorption Spectra
DSSCs
- scheme1.jpg
Outlining of molecular structures for D-π-A System.
- Supportinginformation.doc
