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Oxide-based memristors hold potential for energy-efficient neuromorphic hardware in ‘Internet of Things’ applications, yet optimizing performance with CMOS-compatible low-temperature fabrication is challenging. Here, the authors employ a dual-function electrode strategy using an oxygen vacancy reservoir in an ITO/WO₃/TiN system, achieving enhanced memristive and synaptic performance, paving the way for advanced neuromorphic applications.

A multimodal in situ electron microscopy approach enables direct visualization of structural and chemical evolution in a working halide perovskite light-emitting diode with nanometre precision.

The authors measure picosecond spin pumping in FeRh as a function of temperature by optical pump-THz emission spectroscopy. In the antiferromagnetic phase of FeRh enhanced spin pumping above the value measured in the ferromagnetic phase is observed.

Particle fusion is a promising process for constructing nanomaterials, but challenging to control in synthetic systems. Here, the authors report a method for kinetically regulated particle fusion controlled by variation in polymer chain length.

To turn on and obtain emission from lanthanide-doped insulating nanoparticles, an electrical excitation pathway coupling them to organic optical molecules to form nanohybrids is described, enabling tunable electroluminescence properties of LEDs fabricated from such materials.

Lattice mismatches are a difficult obstacle in the formation of core-shell heterostructures. Here, the authors develop a strategy to overcome the lattice mismatch and grow α-phase lead halide perovskites onto β-phase lanthanide-doped nanoparticles.

A low-temperature synthesis has been developed to make single crystals of titanium dioxide that contain pores tens to hundreds of nanometres in size. This opens the way to cheap, highly efficient optoelectronic devices. See Letter p.215

Despite the demonstration that nanowires can grow below the eutectic point, a clear understanding of how this happens has not been reached. Video-rate transmission electron microscopy brings new insight into the issue, showing in real time the growth of silicon nanowires with palladium catalysts.

deQuilettes et al. show that hexylammonium bromide forms an iodide-rich 2D structure and bromide gradient at the surface of 3D perovskite, both of which limit interfacial charge and energy losses in perovskite solar cells.

By exploiting Tamm plasmon modes, Ooi et al. report highly directional and enhanced electroluminescence in quasi-2D perovskite LEDs with angular FWHM of 36.6° and spectral FWHM of 12.1 nm. The photonic platform is versatile and tuneable across the visible spectral range with directionality up to 40°.

One-dimensional nanostructures have been shown to increase multiple-exciton generation, offering a pathway to breaking the Shockley–Queisser limit. Here, Davis et al. have fabricated working photovoltaic devices based on high-quality PbSe nanorods and a maximum external quantum efficiency of 122 % was demonstrated.

The fine interface between crystallinity and amorphicity in synthetic hybrid materials has to-date been relatively under-explored. Here, the authors probe the relationship between amorphisation and melting behaviour in zeolitic metal-organic frameworks as a route towards functional glasses.

Perovskite LEDs with exceptional performance at high brightness are demonstrated achieving an operational half-lifetime of 32 hours, an important step towards commercialization opening up new opportunities beyond conventional LED technologies, such as perovskite electrically pumped lasers.

The field of perovskite light-emitting diodes witnesses rapid development in both device processing strategies and performances. Here Wang et al. develop high-quality perovskite-molecule composite thin films and achieve high quantum efficiency of 17.3% and half-lifetime of 100 h.

Photoemission electron microscopy images of trap states in halide peroskites, spatially correlated with their structural and compositional factors, may help in managing power losses in optoelectronic applications. 

Ni-rich layered cathode materials are promising for high-energy-density Li-ion batteries, but their degradation mechanisms are still poorly understood. A structure-driven mechanism with a lowered accessible state of charge after repetitive cycling is proposed for a typical NMC811 cathode.

Heterojunction structures based on 2D materials show promise for wearable and textile electronics. Here, the authors demonstrate fully inkjet-printed hetero junctions of graphene and h-BN as a platform for FET-based smart electronics on wearable and washable textile substrates.

Localized surface plasmon resonances of an individual silver nanocube are reconstructed in three dimensions using electron energy-loss spectrum imaging, resulting in a better understanding of the optical response of noble-metal nanoparticles.

Modifying the surfaces and grain boundaries of perovskites with passivating potassium halide layers can mitigate non-radiative losses and photoinduced ion migration, increasing luminescence yields and improving charge transport and interfaces with device electrodes.