AP19174728 — Study of the Efficiency Limit of Organometallic Perovskites Based on CH3NH3SnI3 and CH3NH3PbI3 for Photovoltaics
The purpose of this work is to study the limit of energy conversion efficiency and stability of an organometallic perovskite cell, including by developing an algorithm for modeling a thin-film perovskite solar cell with different characteristics that affect the limit of energy conversion efficiency.
Relevance of the project is to study a generalized model of an efficient perovskite solar cell based on CH3NH3SnI3 and CH3NH3PbI3, the characteristic of which depends on the influence of the density of bulk and interfacial defects, by studying the quantitative analysis of the numerical data of various CH3NH3SnI3 and CH3NH3PbI3 structures, as well as the degradation of the functional layer of a thin-film solar cell based on CH3NH3PbI3 exposed to ambient atmosphere using FT-IR spectroscopy. The actual problem of the project is to determine the marginal efficiency of a solar cell by combining the parameters and properties of the materials of the absorbing and transport layers, as well as to study ways to increase the stability of solar cells.
Scientific supervisor: Doctor of Ph.D., Associate Professor, Zhansaya Omarova
Results obtained: Within the project, a generalized model of a perovskite solar cell was developed, taking into account the influence of bulk, surface, and interfacial defects. The effect of defect concentration on the photovoltaic performance of CH₃NH₃SnI₃-based devices with different transport layers was analyzed. It was established that an increase in defect density leads to a significant decrease in power conversion efficiency and enhanced recombination losses. The optimal thickness of the active layer was determined to achieve maximum photocurrent and efficiency. The degradation mechanisms of perovskite films under the influence of moisture, light, and air were investigated, along with their impact on structural and optical properties. The obtained results improve the understanding of factors limiting the efficiency and stability of perovskite solar cells.
List of publications with links to them
- Омарова Ж. Б., Ережеп Д., Жантуаров Р., Токмолдин Н. Исследование стабильности функционального слоя в перовскитном солнечном элементе // Журнал проблем эволюции открытых систем. – 2023. – Т. 25, № 3–4. – С. 56–64. https://doi.org/10.26577/JPEOS.2023.v25.i3-4.i4
- Bakar A., Ahmed M., Omarova Z. B., Toleubay G. K., Shalenov E. O. Revealing the improved elasto-mechanical, opto-electronic, thermodynamic and thermoelectric properties of double perovskites Rb₂TlAF₆ (A = Ir, Rh): A DFT analysis // Surfaces and Interfaces. – 2025. – Vol. 71. – 106777. https://doi.org/10.1016/j.surfin.2025.106777
- Shaikhmeddenova A., Shalenov E., Dossymbekova A., Omarova Zh. Performance optimisation of CH₃NH₃SnI₃ based perovskite solar cells via drift-diffusion simulation // The 13th International Conference on Nanomaterials and Advanced Energy Storage Systems (INESS-2025). – 2025. – P. 133.
- Omarova Zh., Shaikhmeddenova A., Shalenov E., Dossymbekova A. Modeling and performance optimization of CH₃NH₃SnI₃-based lead-free perovskite solar cells // The 5th International Online Conference on Nanomaterials. – 2025. – P. 120. https://sciforum.net/events_files/937/customs/433b31eac0b704b02fd16bf652d0c801.pdf