Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO25)
Publication date: 24th April 2025
Perovskite solar cells (PSCs) are among the most promising next-generation photovoltaic technologies, combining high efficiency with low manufacturing costs. However, long-term stability remains a critical barrier for commercialization. One of the primary degradation mechanisms is chemical instability and ion migration within the perovskite layer, which leads to performance losses and phase instability.
Light-induced degradation in organo-lead halide perovskites, such as (FA₀.₈₃MA₀.₁₇)₀.₉₅Cs₀.₀₅Pb(I₀.₈₃Br₀.₁₇)₃, is initiated by the generation of iodide interstitials at the interfaces between the perovskite layer and the adjacent charge transport layers. These small, mobile anions redistribute under voltage stress, altering the built-in potential of the device and migrating toward the thin Ag electrode, where they contribute to resistance changes and the formation of corrosive AgI. While trap annihilation of certain iodide defects occurs near the anode, the accumulation of negatively charged iodide interstitials near the cathode has been found to be particularly detrimental to solar cell efficiency.
This project aims to investigate ion migration phenomena using Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS), a high-resolution technique capable of depth-profiling chemical species with sub-micron spatial precision. To enhance interpretation of ion movement in relation to material morphology and surface potential, Atomic Force Microscopy (AFM) and Kelvin Probe Force Microscopy (KPFM) will be integrated into the workflow. The combination of these tools provides a powerful approach to visualizing both the static and dynamic distribution of mobile ions, such as halides, under various stress conditions.
In the initial phase of the project, a comprehensive literature review has been conducted to map current understanding and identify methodological gaps. The lab work, initiated recently, focuses on sample preparation protocols and ToF-SIMS depth profiling of PSC stacks. Early experiments are underway, and preliminary results will be shared.
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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.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.