Low-cost Schiff bases chromophores as efficient co-sensitizers for MH-13 in dye-sensitized solar cells
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Herein, we reported on the synthesis of four Schiff bases (S1–4) based on salicylaldehyde moieties and their applications as metal-free organic chromophores for sensitization and co-sensitization of dye-sensitized solar cells (DSSCs). These sensitizers are comprised of a phenyl ring as a donor scaffold connected with a carboxylic group as acceptor/anchoring unit. To gauge their applicability as photosensitizers for DSSCs the photophysical, electrochemical, theoretical studies and charge transport characteristics were carried out. Interestingly, uses of S2 and S4 dyes as co-sensitizers with well-known MH-13 dye resulted in enhancing its photovoltaic properties from 8.217 to 8.79% and 8.48%, respectively. Furthermore, the photo-sensitizer S3 individually shows better photovoltaic properties compared to S1, S2 and S4, due to the fast photo-induced electron transfer from the phenyl ring to the nitro group. This fast electron transfer resulted from the overlapping between HOMO and LUMO levels on phenyl ring bearing nitro group. The results indicate that these simple and easy prepared Schiff bases moieties may be considered as promising and low-cost co-sensitizers for DSSCs.
The authors of this manuscript would like to thank science and technology development fund (STDF), Egypt (http://www.stdf.org.eg/index.php/en/) for the financial support of this scientific research work through Short–Term Fellowship (STF) project. Also, my sincere thanks to Prof. Dr. Ahmed Elshafei (College of textiles, North Carolina State University, USA) for his acceptance to perform a part of this work in his lab.
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Conflict of interest
The authors declared no conflict of interests.
- 17.A.G. Imer, R.H.B. Syan, M. Gülcan, Y.S. Ocak, A. Tombak, J. Mater. Sci.: Mater. Electron. 29, 898–905 (2018)Google Scholar
- 33.P. Gabbott, Principles and Applications of Thermal Analysis. (Wiley, Hoboken, 2008)Google Scholar
- 34.P.J. Haines, Thermal Methods of Analysis: Principles, Applications and Problems. (Springer, Dordrecht, 2012)Google Scholar
- 38.P. Zamora, M. Camarada, I. Jessop, F. Díaz, M. del Valle, L. Cattin, G. Louarn, J. Bernede, Int. J. Electrochem. Sci. 7, 8276–8287 (2012)Google Scholar
- 46.Q. Wang, J.-E. Moser, M. Grätzel, J. Phys. Chem. B 109, 4945–14953 (2005)Google Scholar