Publication date: 15th December 2025
Hybrid metal‑halide perovskites (MHPs) promise low‑cost, high‑efficiency solar cells, yet their macroscopic performance is limited by loss pathways that originate in nano‑ and microscale structures. Thus, to understand MHP materials requires the characterization of the many nano- and microscale structures; from sub-granular twin domains, over grain boundaries and interfaces to lateral variations in crystal grains orientations and facets. Electrical SPM operation modes like Kelvin probe force microscopy (KPFM) or conductive atomic force microscopy are ideally suited to decipher these structure-function relationships. In this presentation, I will present some of our recent activities in the development of specialized scanning probe microscopy methods to study hybrid perovskite materials.
As one single measurement technique cannot capture the full picture, we develop a combined optical‑scanning‑probe platform that integrates spatially resolved photoluminescence (PL), time‑resolved PL (TRPL) and electrical scanning probe microscopy (Kelvin‑probe force microscopy, conductive AFM and nanoscale surface‑photovoltage spectroscopy). This multimodal microscope allows simultaneous measurements of the same region with diffraction‑limited confocal PL spectroscopy (≈300 nm lateral resolution), time-resolved photoluminescence (TRPL, time-resolution ~ps) and quantitative electrical AFM (10-20 nm lateral resolution). This nanoscale photovoltaics lab on a tip therefore bridges the long‑standing divide between optical spectroscopy and nanoscale electrical probing. By delivering a correlative view of band‑gap emission, carrier dynamics and electrostatic landscape, it enables quantitative identification of the dominant nanoscale loss mechanisms that limit MHP solar‑cell performance. The approach can be extended to other emerging photovoltaic materials and offers a powerful tool for rational engineering of grain boundaries, transport layers and compositional stability.
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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.