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Organic Electroplated Luminescent Microarrays up to 2800 ppi toward Near‐Eye Displays via Diffusion‐Weakened Boundary Effects

The size dependence of electroplating technology on electrified electrode microarrays is unique because smaller pixel sizes tend to ease the overlap of the diffusion layers and weaken the boundary effects, indicating the immense potential of this technique for the fabrication of high-resolution and immersive virtual reality fine displays. Abstract...

Enabling Quasi‐2D Perovskite‐Compatible Growth Environment for Efficient Light‐Emitting Diodes

An effective dimethyl sulfoxide-based vapor-assisted growth (VAG) protocol is developed which enables the fabrication of high-quality quasi-2D perovskite films with graded energy landscape. VAG-derived films exhibit smooth and compact surface with uniformly distributed nanograins, contributing to enhanced radiative and suppressed nonradiative recombination....

Water Transfer Printing of Multilayered Near‐Infrared Organic Photodetectors

The multilayered structure enabled by water transfer printing could effectively suppress the noise current and resolve light irradiance down to sub-picowatts. As a result, the multilayered structure near-infrared organic photodetectors achieve a low noise current of 7.45 × 10−28 A2 Hz−1 and exhibit the detectivity of 8.8 × 1011 Jones at 860 nm. ...

Coding Metasurfaces with Reconfiguration Capabilities Based on Optical Activation of Phase‐Change Materials for Terahertz Beam Manipulations

An optical-based coding metasurface is simulated and experimentally demonstrated for multifunctional control of terahertz waves. The proposed meta-atoms integrating phase-change material GeTe provide 1-bit phase difference by optical control of GeTe's state. The optical irradiation of the metasurface through specific coding masks provides different...

Suppression of Eu2+ Luminescence Loss

A fresh viewpoint is provided to comprehend the outstanding luminescence properties of Eu2+-doped SrMgP2O7 material which owns the narrow-band emission and near-unity internal quantum yield upon UV excitation, and the suppression of Eu2+ luminescence loss is essentially associated with highly rigid local coordination and strong binding of Eu2+ to its...

Broadband and High‐Sensitivity Time‐Resolved THz System Using Grating‐Assisted Tilted‐Pulse‐Front Phase Matching

A broadband and high-sensitivity time-resolved terahertz (THz) system is demonstrated. The concept relies on a phase grating etched at the surface of both the THz generation and detection crystals. This configuration covers a large spectral bandwidth, extending up to 6.5 THz, and increases the spectral intensity by more than 400 times around 3 THz....

Impurity‐Induced Robust Trionic Effect in Layered Violet Phosphorus

A novel layered material, violet phosphorus (VP), possesses robust trionic effect with a huge trion binding energy of ≈109 meV. With the trion-exciton conversion by Ar+ plasma exposure, VP's photoluminescence can be modulated based on a combined effect, which is related to the reduction of the population of stannus SnIP impurities and electron withdrawal...

Rational Management of Charge Transfer Character of Benzothienopyrimidine‐Based N‐Type Host for Blue Phosphorescent Organic Light‐Emitting Diodes

Benzothienopyrimidine derived hosts are synthesized as the N-type host for blue phosphors by CN modification and achieved high external quantum efficiency over 20% in the sky blue and deep blue phosphorescent organic light-emitting diodes. Abstract Two materials, 3-(4-(9H-carbazol-9-yl)benzo[4,5]thieno[3,2-d]pyrimidin-2-yl)-5-(triphenylsilyl)benzonitrile...

A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response

Benefiting from the obtained superwettability states, a versatile optical metasurface is demonstrated. The superhydrophilic state enables an enhanced color response with water, while the quasi-superhydrophobic state imparts the fragile antennas an ability to self-clean dust contamination. Furthermore, the metasurface can be easily switched and repeated...

Unusual Red Light Emission from Nonmetallic Cu2Te Microdisk for Laser and SERS Applications

Hexagonal Cu2Te microdisks are successfully prepared via chemical vapor deposition procedure using GaTe as Te source. The semiconducting material of Cu2Te hexagonal microdisk is demonstrated to be a good candidate for red lasing (quality factor of ≈2000) and nonmetallic surface enhanced Raman scattering (SERS) (detection limit of 10−9 m) applications...

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