Researchers at Fraunhofer IAF have developed a GaN transistor technology with a gate length of 70 nm that achieves record efficiency values under typical satellite conditions. In the future, this technology aims to enable compact active antennas for high-bitrate data transfers in the Ka, Q, and W-bands, thereby contributing to the establishment and expansion of seamless and resilient global communication networks via high-throughput satellites. Fraunhofer IAF will present these and other research results from the field of high-frequency electronics at EuMW in Utrecht from September 21 to 26, 2025.

This promising new catalyst can speed up the oxygen evolution reaction to create clean energy.

Unpaired electrons located at linear band dispersion (LBD) are exceptional and called Dirac electrons (DE). They are paid attention to because of the unique electronic properties such as temperature (T)-independent resistivity, as if they belong to neither metallic nor non-metallic substances. In this study, we have developed a series of new organic Dirac electron systems and discovered universal features of magnetic behavior originating from LBD.

Metal halide perovskites, owing to their remarkable optoelectronic properties and broad application prospects, have emerged as a research hotspot in materials science and photovoltaics. In addressing challenges related to energy loss, photoelectric conversion efficiency, and operational stability in perovskite solar cells (PSCs), various strategies have been proposed, such as improving perovskite crystallization, developing tandem architectures, and advancing interfacial engineering. However, the specific impact of these approaches on internal energy transfer and conversion mechanisms within PSCs remains insufficiently understood. This review systematically examines the relationship between energy and perovskite materials throughout the photon absorption to charge carrier transport process, with particular focus on key strategies for minimizing energy losses and their underlying influence on energy-level alignment-especially in the electron transport layer and hole transport layer. It summarizes optimal absorption conditions and contributing factors during energy transfer, alongside representative case studies of high-performing systems. By elucidating these mechanisms, this work offers valuable theoretical insights for optimizing energy-level alignment, reducing energy dissipation, and guiding experimental design in PSCs research.

A new approach to manufacturing multicolour lenses could inspire a new generation of tiny, cheap, and powerful optics for portable devices such as phones and drones.

The design uses layers of metamaterials to simultaneously focus a range of wavelengths from an unpolarised source and over a large diameter, overcoming a major limitation of metalenses, said the first author of the paper reporting the design, Mr Joshua Jordaan, from the Research School of Physics at the Australian National University and the ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS).

Superconducting sensors can detect single low-energy photons. UZH researchers have now used this capability to search for light dark matter particles in the universe.