Bandgap engineering on hybrid organic-inorganic halide-based perovskites solar cells: Effect of Mn doping
Nagalingam Rajamanickam a, Eugenia Martinez-Ferrero a, Emilio Palomares a b
a Institute of Chemical Research of Catalonia (ICIQ), Tarragona – 43007, Spain
b ICREA, Passeig LLuis Companys 23, E-08010, Spain
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP23)
Kobe, Japan, 2023 January 22nd - 24th
Organizers: Seigo Ito, Hideo Ohkita and Atsushi Wakamiya
Oral, Nagalingam Rajamanickam, presentation 087
DOI: https://doi.org/10.29363/nanoge.iperop.2023.087
Publication date: 21st November 2022

In recent years, the hybrid organic-inorganic trihalide perovskites compounds have attracted numerous attentions and remarkable performance as active layers in the fabrication of highly efficient solar cells, photonics, and other optoelectronic devices. Extensive efforts on the controlled synthesis of perovskite nanostructures have been made towards potential device applications. As well, a simple established strategy of chemical doping has been used to achieve the highest efficiency and high stability perovskite-based solar cells. The band gap engineering in perovskites tuning its electronic and optical properties, which is one of the key factors to make an efficient and multifunctional optoelectronic device. In this work, the effect of Mn doping in organic-inorganic perovskite CsFAMA (Cs0.05[MA0.17FA0.83Pb(I0.85Br0.15)3]0.95) has been studied with a power conversion efficiency over 20%. The rational design and fabrication of CsFAMA lead to the enhancements of all the photovoltaic parameters, such as charge and electron transport. To incorporate Mn can effectively eliminate the trap-assist and bi-molecular recombination. Particularly, the occurrence of magnetism in CsFAMA has been studied and confirmed from magnetization measurements. The influence of Mn doping in CsFAMA films, structural and morphological has been analyzed in detail. Due to the eminent double exchange and super exchange interactions in between the Mn2+-I--Mn3+ ions in Mn doped CsFAMA giving rise to the charge/spin transport in perovskite based photovoltaic devices. We explicitly determined the role of intrinsic spin–orbit coupling (SOC) in Mn-doped CsFAMA perovskites.  Our finding offers an alternative pathway for spintronic, light controlled magnetic and photovoltaic devices.

 

Reference:

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[3] Deng, L; Yang, H; Pan, R; Yu, H; Li, J; Xu, L; Wang, K. Achieving 20% photovoltaic efficiency by manganese doped methylammonium lead halide perovskites. J. Energy Chem. 2021, 60, 376-383.

NR is supported by the project that has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Individual Fellowships - grant agreement No. 101028693.

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