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High-entropy hybrid perovskites exhibit improved materials properties compared with their individual components. When employed in solar cells, champion devices achieve a certified power conversion efficiency of 25.5% and an extrapolated T90 lifetime of over 5,000 h under continuous light soaking.
A wide-field wavefront sensor consisting of a microlens array on the native image plane enables observation of atmospheric turbulence over a field of view of 1,100 arcsec at 30 Hz with an 80 cm telescope. With the aid of a neural network, turbulence can be predicted 33 ms in advance.
Shortwave infrared photothermal microscopy enables chemical imaging at millimetre depths with a micrometre spatial resolution in tissue-mimicking phantoms, intact tumour spheroids and various biological tissues.
Exploiting the energy transfer between the host triplet states and spin doublet exciton states of a radical organic emitter enables near-infrared organic light-emitting diodes with an external quantum efficiency up to 9.6% at an emission wavelength of 800 nm.
Spatial distribution of the photoluminescence of interlayer excitons in van der Waals heterostructures comprising MoSe2 and WSe2 monolayers and encapsulated in rather thick hexagonal boron nitride is investigated, revealing interlayer exciton long-range transport with 1/e decay distances reaching and exceeding 100 μm.
Non-radiative decay in two-dimensional WSe2 quantum emitters is electrically suppressed through charge depletion using dual gate configurations. The single-photon emitter transition quantum efficiency after gating is increased to 76.4 ± 14.6% on average.
Super-resolved photonic force microscopy employs the fluorescence of lanthanide-doped nanoparticles as a force probe, enabling the measurement of sub-femtonewton forces with a sensitivity of 1.8 fN Hz–1/2, approaching the thermal limit.
Using the 3R phase of molybdenum disulfide nanodisks with various radii, more than 100-fold enhancement of second-harmonic generation can be obtained in a single resonant nanodisk compared with an unpatterned flake of the same thickness.
A single-metasurface-based holographic light projection covering the whole 360° field of view is realized by optimizing the metasurface design through a neural network and applying 360° structured light for holographic light projection and three-dimensional imaging.
High-harmonic spectroscopy is employed to investigate the electron–phonon, anharmonic phonon–phonon coupling, and their relaxation dynamics in solids. It reveals the maximum displacement of neighbouring oxygen atoms in α-quartz crystal to tens of picometres in real space.
By measuring the Brillouin gain only at mechanical frequencies of interest, Brillouin gain microscopy enables Brillouin imaging with a temporal resolution of 100 µs with excitation energies of 23 µJ on biological samples.
A fully hybrid integrated erbium-doped photonic integrated waveguide laser with wide tuning of 40 nm, side-mode suppression ratio of >70 dB and output power up to 17 mW is demonstrated, achieving not only footprint reduction but also the long-anticipated fibre-laser coherence.
Researchers show that atom-like dipoles based on germanium vacancy centres in diamond may be useful as antennas, exhibiting million-fold near-field optical intensity enhancement. These antennas are used to detect and control the charge state of nearby carbon vacancies.
Perovskite zinc sulphide phosphors in perovskite-based alternating-current electroluminescent devices are employed as skin-wearable devices with high stretchability, monochromaticity and power efficiency.
Owing to spectral long-range correlation, broadband energy can be delivered to extended targets deep inside a multiple-scattering system, greatly broadening the scope of controlling wave transport in disordered systems.
The position and emission wavelengths of single quantum dots embedded in a one-dimensional planar cavity can be simultaneously determined from a single photoluminescence image with 15 nm spatial accuracy and subnanometric spectral accuracy in the near-infrared.
Exploiting the interactions between bright excitons and free carriers in an atomically thin semiconductor of trilayer tungsten diselenide WSe2 results in Fermi polarons that exhibit unusually large nonlinearity.
A terahertz-driven photogun with field gradients of 3 GV m−1 is demonstrated by using a few microjoules of single-cycle terahertz radiation. The emitted electrons are accelerated up to 14 keV and can be focused down to 90 μm. The electron bunch is further compressed to 167 fs.
Terawatt-scale, sub-femtosecond, soft X-ray pulses have been demonstrated at the Linac Coherent Light Source using a superradiant cascaded amplification approach.