Publication date: 15th December 2025
Organic–inorganic lead-halide perovskites now underpin record-breaking single-junction solar-cell efficiencies (>26 %) and highly tuneable light-emitting diodes (LEDs). Yet both technologies still suffer performance losses linked to trap-mediated recombination and field-dependent carrier imbalances. Crucially, these loss pathways emerge only under true operating conditions, where built-in and applied electric fields, charge-transport layers, space-charge accumulation, and ion migration reshape the local potential landscape in ways different from the neat films.
In this talk, I will outline our progress toward producing operando, molecular-scale “movies” of the electronic dynamics that govern perovskite devices. I will begin by showing how nanosecond transient-absorption spectroscopy allows us to track the real-time behaviour of free charge carriers; by analysing subtle features in the resulting spectra we can map the internal electric field and pinpoint where carriers become either trapped or accelerated within the device stack.
I will then describe how these measurements are complemented by ultrafast mid-infrared pump–probe, or “optical-control,” spectroscopy, which selectively excites and monitors bound excitonic and polaronic states—early-stage species that often lead to non-radiative losses in perovskite photovoltaic and light-emitting structures. Both action spectroscopy with photocurrent and photovoltage detection will be presented.
Taken together, the two spectroscopic approaches provide a unified view of both free and bound charge populations under realistic operating conditions. Finally, I will show how coupling these experimental insights to drift-diffusion modelling closes the loop between microscopic dynamics and macroscopic performance, yielding concrete design rules for faster, more efficient optoelectronic devices.
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.
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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.