Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
DOI: https://doi.org/10.29363/nanoge.iperop.2024.041
Publication date: 18th October 2023
Tin-based perovskite solar cells are the most promising alternative to their toxic lead counterparts, due to their outstanding optoelectronic properties, i.e. high charge carrier mobility, and narrower bandgap, closer to the optimal range[1]. Nevertheless, their efficiency currently lags behind, with the highest power conversion efficiency (PCE) approaching 15%[2]. The efficiency limitation is attributed to electronic defects primarily due to the facile oxidation of Sn2+ to Sn4+ resulting in a self-p-doping effect[3]. Additionally, the stereochemical activity of the Sn2+ lone pair leads to an off-centring of the metal and, consequently, to a distortion of the SnI6 octahedron[4]. In this study, we explore the influence of Sr2+ doping on lattice distortion in perovskite materials and on its optoelectronic properties. Through a comprehensive approach involving calculations based on density functional theory (DFT) and practical experiments, we demonstrate the beneficial impact of doping in the tin perovskite structure. The Sr2+ tends to fill tin vacancies, reducing the hole concentration and decreasing the microstrain of the crystal structure. Consequently, device performance improves, particularly in terms of open-circuit voltage (VOC) and fill factor (FF). Our approach opens a path to control the tin off-centring and the self-p-doping to obtain highly efficient and stable tin halide perovskite solar cells.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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