Publication date: 21st July 2025
Understanding the physics and origins of degradation mechanisms in solar cells is a challenging task. As a result, research often concentrates on a few model systems, relying on extensive and often costly characterization to track how material properties evolve over time.
This approach is particularly limiting for technologies like organic and perovskite solar cells, which can use a wide variety of materials. To unlock their full potential, accelerated characterization methods are needed. Without these, building quantitative structure-property relationships in the hope of designing bespoke materials for targeted applications (such as indoor, semi-transparent, and agrivoltaics) will fall short.
In this talk, I will present how modeling and machine learning (ML) can be coupled with high-throughput data from accelerated aging experiments to address this challenge. I will introduce optimPV, a fully open-source framework that integrates multiple physical modeling tools (e.g., PDE solvers, optical simulations, drift-diffusion modeling) with ML-based optimization methods (including Bayesian optimization, Bayesian inference, and genetic algorithms).
I will show how optimPV enables the identification of the dominant degradation process and the extraction of key material parameters, such as charge carrier mobilities and recombination rates. The effectiveness of this framework will be illustrated through a large-scale degradation study on organic solar cells, featuring 25 donor-acceptor blends processed under varied conditions. This analysis revealed key degradation trends and identified problematic material combinations to avoid in future formulations.
Lastly, I will discuss how the framework can be extended to other systems and case studies, incorporating a range of material types (organic and perovskite), physical models (PDE-based and drift-diffusion), and experimental techniques, including: (i) transient absorption spectroscopy, (ii) transient photoluminescence and microwave conductivity, and (iii) light-intensity-dependent current–voltage measurements.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
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.