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Self-assembled perovskite nanoplatelets emit linearly polarized light, enabling the realization of red perovskite light-emitting diodes with a 74.4% degree of linear polarization.
Using inverse design, a 3D silicon photonics platform that can be used for the mathematical operation of vector–matrix multiplication with light is demonstrated, potentially enabling large-scale wave-based analogue computing.
Researchers demonstrate a size-dependent lanthanide energy transfer effect in upconversion nanoparticles with depleted surface quenching, resulting in upconversion quantum yields of 13.0 ± 1.3%.
Tunable afterglow emission in the visible region is enabled by trap-induced persistent luminescence in organic host–guest materials, with controllable trap depths.
Free-electron homodyne detection allows measuring phase-resolved optical responses in electron microscopy, demonstrated in the imaging of plasmonic fields with few-nanometre spatial and sub-cycle temporal resolutions.
Controlling the doping depth in perovskites allows the creation of a depletion region that inhibits the migration of iodide ions under illumination. Solar cells exhibit a power conversion efficiency of 24.6% and maintain 88% of the initial efficiency after 1,900 h of continuous operation.
Conformal transformation optics is exploited to design curved accelerating waveguides with spatially gradient curvatures to boost the nonlinear efficiency and broaden the bandwidth of the nonlinear optical processes in the waveguides.
An integrated high-energy laser that combines a passively Q-switched laser cavity based on a silicon-nitride photonic integrated circuit with an optically pumped gain layer consisting of thulium-doped alumina is reported, representing a pivotal advancement in integrated pulsed lasers.
A chemical washing method called solvent sieve is developed to resolve the phase dimension issue of metal halide perovskites. The sieved perovskites demonstrate a record external quantum efficiency of 29.5% and a T50 lifetime of 18.67 h at 12,000 cd m−2; 80% of the device external quantum efficiency lasts for 100 days in the ambient.
A reflective spatial light modulator for extreme ultraviolet (EUV) or soft X-ray light is demonstrated in an electronic Wigner crystal material with a sub-90-nm feature size. The diffraction grating imprinted by sub-picosecond EUV beams is rewritable. The projected efficiency according to the modelling exceeds 1%.
Molecular perdeuteration of thermally activated delayed fluorescence emitters improves the performance of blue organic light-emitting diodes, enabling a peak external quantum efficiency of 33.1% and a device lifetime to reach 80% of initial luminance of over 1,300 h.
Two precursor additives improve the performance of tin-based perovskite solar cells, delivering a power conversion efficiency of 15.38% and maintaining 93% of the initial efficiency after 500 h of continuous illumination.
An optical readout technique for the chemical potential of an arbitrary two-dimensional material is realized using a monolayer transition metal dichalcogenide semiconductor sensor whose optical response sharply depends on the chemical potential.
Addition of a multifunctional ionic additive in mixed two-dimensional–three-dimensional bromide/chloride perovskites enables efficient blue perovskite LEDs with external quantum efficiency of up to 21.4% and half-lifetime of 129 min at an initial luminance of 100 cd m–2.
A wireless optoelectronic probe integrates a microscale light-emitting diode and a photodetector coated with oxygen-sensitive dyes to monitor the partial pressure of oxygen in the deep brain of freely moving mice.