finished projects

Natural carbon dots as counter electrodes for photovoltaic applications (Ministry of Education and Science of Kazakhstan Grant Project 2018 - 2020)

The aim of the project was the development of natural carbon dot-based counter electrodes for third-generation organic solar cells: dye-sensitized and perovskite. Current use of the counter electrodes made of noble metals (Au, Ag, Pt) in organic solar cells affects the final cost of produced energy and restricts the commercialization of the solar cells. Carbon dots (CDs) are a new type of nanocarbon materials and have excellent properties: they are cheap, abundant, and environmentally friendly. Their physico-chemical properties can be tuned by synthetic modifications. Additionally, photoexcited carbon dots have the ability to undergo charge-transfer.

B. Baptayev, D. Mustazheb, Z. Abilova, M.P. Balanay. Nanostructured flower-shaped CuCo2S4 as a Pt-free counter-electrode for dye-sensitized solar cells. Chem. Commun. 56 (2020) 12190. DOI:10.1039/D0CC04211K.

B. Baptayev, S. Adilov, M.P. Balanay. Surface modification of TiO2 photoanodes with In3+ using a simple soaking technique for enhancing the efficiency of dye-sensitized solar cells. J. Photochem. Photobiol. A 394 (2020) 112468. DOI:10.1016/j.jphotochem.2020.112468.

B. Baptayev, D. Mustazheb, M.P. Balanay. Binary transition metal sulfides as an economical Pt-free counter electrodes for dye-sensitized solar cells. Mater. Today: Proc. 25 (2020) 24. DOI:10.1016/j.matpr.2019.10.170.

B. Baptayev, A. Aukenova, D. Mustazheb, M. Kazaliyev, M.P. Balanay. Pt-free counter electrode based on orange fiber-derived carbon embedded cobalt sulfide nanoflakes for dye-sensitized solar cells. J. Photochem. Photobiol. A 383 (2019) 111977. DOI:10.1016/j.jphotochem.2019.111977.

B. Baptayev, S.H. Lee, D.H. Kim, M.P. Balanay. Controlling aggregation using self-assembled axially coordinated pyridine-based ligands on porphyrin analogues for dye-sensitized solar cells. Chem. Phys. Lett. 730 (2019) 407. DOI:10.1016/j.cplett.2019.06.008.

B. Baptayev, A. Rysbekova, D. Kalpakov, A. Aukenova, D. Mustazheb, Z. Salkenova, M. Kazaliyev, M.P. Balanay. Control of porphyrin dye aggregation using bis(4-pyridyl)alkanes in dye sensitized solar cells. Eurasian Chem.-Technol. J. 21 (2019) 63. DOI:10.18321/ectj792.

Synthesis of natural-derived carbon dots for biomedical applications

This project was in collaboration with Prof. Haiyan Fan (Chemistry Department, Nazarbayev University) and Prof. Yingqiu Xie (Biology Department, Nazarbayev University).

The major aim of the project is to synthesize doped carbon dots from natural sources such as tea and date pits. Carbon dots have been increasingly utilized as a substitute for the more expensive semiconductor-based quantum dots nanomaterials over the past number of years which can be applied to various areas such as bioimaging, optoelectronics, and catalysis. The as-prepared CDs exhibits strong fluorescence property and has the ability to inhibit the growth of cancer cells such as human lung cancer, breast cancer, and prostate cancer cells.

A.A. Nurkesh, M.P. Balanay, T. Yeleusizov, D. Tursynkhan, Q. Yang, X. Wan, L. Manarbek, A. Maipas, B. Matkarimov, Y. Zhang, H. Fan, L.-X. Miao, S.P. Li, Z. Chen, Y. Xie. Natural product-derived carbon nanodots overcome drug resistance through regulation of Hippo pathway effectors. Cancer Res. 78 (2018) 5498.

Y. Xie, Q. Sun, A. Nurkesh, J. Lu, S. Kauanova, J. Feng, D. Tursynkhan, Q. Yang, A. Kassymbek, M. Karibayev, K. Duisenova, H. Fan, X. Wang, L. Manarbek, A. Maipas, Z. Chen, M.P. Balanay. Dysregulation of YAP by ARF stimulated with tea-derived carbon nanodots. Sci. Rep. 7 (2017) 16577. DOI:10.1038/s41598-017-16441-y.

Y. Xie, O. Filchakova, Q. Yang, Y. Yesbolatov, D. Tursynkhan, A. Kassymbek, M. Bouhrara, K. Wang, M.P. Balanay, H. Fan. Inhibition of cancer cell proliferation by carbon-dots derived from date pits at low-dose. ChemistrySelect 2 (2017) 4079. DOI:10.1002/slct.201700575.

Effect of benzodiazole derivatives containing sulfur, oxygen, and selenium on the efficiency of porphyrin-based dye-sensitized solar cells (Social Policy Grant 2016)

Dye-sensitized solar cells (DSSCs) are still considered to be one of the best alternatives in solar cell technology owing to the use of “non-toxic” components in its design as compared to the leading Perovskites solar cells which uses lead in their basic structure. Wang and colleagues introduced the use of thiophene, furan, and selenophene as part of the π-conjugated bridge and found that those with furan and selenophene have better photovoltaic performances as compared to thiophene which is very prone to recombination effects, especially when iodide/triiodide is used as the redox electrolyte. This approach was incorporated in the porphyrin analogues with the thiophene moiety that produced a better efficiency of 5.8 % compared to furan with 4.7 %. Co-sensitizing it with a triphenylamine-based dyes improves the efficiencies to 6.7 %, which was also observed in YD2-o-C8 dyes. The use of a larger macrocycle in between the donor and acceptor species, such as the benzothiadiazoles and its derivatives could function as a photon sink which will ensure and enhance the possibility of charge separation and migration in the dye. In this research, we did molecular design through theoretical calculations, synthesis of porphyrin-based dyes which was patterned after SM315 by replacing the benzothiadiazole component with benzooxadiazole and benzoselenadiazole, analysis of the photophysical properties of the dyes, fabrication of the DSSC, and measurement of the photovoltaic performances of the dyes.