Improving the photo-stability of triple cation perovskite solar cells using chromophore-infused optically transparent Pectin/polymethyl methacrylate composite

Seyede Maryam Mousavi^a, Mostafa Othman^b, Fangxin Zou^a, Noora Lamminen^c, Hossein Baniasadi^d, Pedro Silva^a, Yujiao Dong^a, Christian wolff^b, Christophe ballif^b, Paola Vivo^c, Imran Asghar^c, Aicha Hessler^b, Jaana vapaavuori^a

^aDepartment of Chemistry and Materials Science, Aalto University School of Chemical Engineering, Espoo, Finland

^bInstitute of Electrical and Microengineering (IEM) Photovoltaics and Thin-Film Electronics Laboratory (PV-Lab), École Polytechnique Fédérale de Lausanne (EPFL), Neuchâtel 2000, Switzerland

^cDepartment of Chemistry and Materials Science, Tampere University School of Chemical Engineering, Tampere, Finland

^dPolymer Synthesis Technology, School of Chemical Engineering, Aalto University, Espoo, Finland

Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)

From halide perovskites to perovskite-inspired materials –Synthesis and Applications - #PeroMat

Sevilla, Spain, 2025 March 3rd - 7th

Organizers: Raquel Galian, Thomas Stergiopoulos and Paola Vivo

Oral, Seyede Maryam Mousavi, presentation 335
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.335
Publication date: 16th December 2024

Perovskite solar cells (PSCs) show great promise due to their high efficiency and low manufacturing costs, yet they encounter notable challenges such as optical losses and stability issues, mainly due to high surface reflection and degradation from UV irradiation, and heat[1-3]. In this study, we present a novel, bio-based composite material comprising pectin, polymethyl methacrylate (PMMA), and a spirobifluorene compound designed to mitigate these issues. This innovative composite exhibits high optical transparency, up to 85%, and significant haze (48% at 550 nm), which helps in minimizing reflection-induced losses. The composite incorporates spirobifluorene, which facilitates down-conversion of UV radiation around 350 nm to higher wavelengths above 400 nm, thereby enhancing both photostability and overall device performance. This material, with its lower thermal conductivity compared to glass, also cools the solar cell surface by serving as a thermal barrier. This composite was subsequently attached to the front side of PSCs, which were structured in an inverse architecture (ITO/Me4pacz/SiOx/PSK/C60/SnOx/Cu) for performance measurements and in a different configuration (FTO/c-TiO/m-TiO/PSK/spiro-meotad/gold) for stability tests ( see Figure 1). The composite's implementation leads to up to a 5 ±0.1% increase in the current density and power conversion efficiency of perovskite solar cells. Additionally, it significantly delays initial photodegradation, enhancing T80 life by 1.1-fold for PP-0.25TSBF and 1.9-fold for PP-0.75TSBF. These advancements highlight the potential of this innovative composite to significantly improve the efficiency, stability, and durability of perovskite solar cells, offering a promising route for future photovoltaic technologies.

References:

[1] Mousavi, S. M., Shirazi, H. D., Ranta, R., Asghar, M. I., Kasurinen, S., Halme, J., & Vapaavuori, J. (2024). Addressing the efficiency loss and degradation of triple cation perovskite solar cells via integrated light managing encapsulation. Materials Today Energy, 46, 101707.

[2] Daghigh Shirazi, H., Mirmohammadi, S. M., Mousavi, S. M., Markkanen, M., Halme, J., Jokinen, V., & Vapaavuori, J. (2024). Bio-inspired surface structures promote optical transmittance and hydrophobicity in cellulose-based films for self-cleaning perovskite solar cells. Communications Materials, 5(1), 88.

[3] Mousavi, S. M., Alidaei, M., Roghabadi, F. A., Ahmadi, V., Sadrameli, S. M., & Vapaavuori, J. (2022). Stability improvement of MAPbI3-based perovskite solar cells using a photoactive solid-solid phase change material. Journal of Alloys and Compounds, 897, 163142.

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