Graphene and other layered materials, such as transition metal dichalcogenides, have rapidly established themselves exceptional building blocks for optoelectronic applications because of their unique properties atomically thin nature. The ability to stack them into van der Waals (vdWs) heterostructures with new functionality has opened a platform fundamental research device applications. Nevertheless, near-infrared (NIR) photodetectors based on semiconductors are rarely realized. In this...

The design of organic photothermal agents (PTAs) for in vivo applications face a demanding set performance requirements, especially intense NIR-absorptivity and sufficient photobleaching resistance. J-aggregation offers facile way to tune the optical properties dyes, thus providing general platform PTAs with desired performance. Herein, we present supramolecular strategy build water-stable, nonphotobleaching, NIR-absorbing nano-PTA (J-NP) from halogenated BODIPY dyes (BDP) efficient therapy....

A general approach toward highly fluorogenic probes across the visible spectrum for various analytes offers significant potential engineering a wide range of bioprobes with diverse sensing and imaging functions. Here we show facile strategy that involves introducing new mechanism in boron dipyrromethene (BODIPY) dyes, based on principle stimuli-triggered dramatic reduction electron-withdrawing capabilities meso-substituents BODIPYs. The has been demonstrated to be applicable BODIPYs emission...

The organic-inorganic halide perovskites have promising applications in light-emitting devices besides solar cells. We here prepare CH3NH3PbBr3 perovskite particles on SiO2 substrates and find that the photoluminescence (PL) spectrum of at room temperature has two peaks, locating 529 549 nm, respectively, much different from corresponding films prepared oxygen plasma-cleaned substrates, which a single peak. double peaks temperature-dependence behaviors. By x-ray diffraction energy dispersive...

Large-sized single-crystal two-dimensional (2D) perovskites are highly desirable owing to their fundamental properties and intriguing ability boost devices. Herein, 2-phenylethylammonium lead bromide [(PEA)2PbBr4] single crystals, which a violet-light-emitting 2D perovskite material, with typical lateral sizes of about one centimeter were successfully grown using seeded solution method. The plates showed well-defined shape (rectangle or hexagon), natural thickness (300-500 μm) similar that...

A new method to employ graphene as top electrode was introduced, and based on that, fully transparent quantum dot light-emitting diodes (T-QLEDs) were successfully fabricated through a lamination process. We adopted the widely used wet transfer bilayer (BG) polydimethylsiloxane/polyethylene terephthalate (PDMS/PET) substrate. The sheet resistance of reduced ∼540 Ω/□ transferring BG for 3 times PDMS/PET. T-QLED has an inverted device structure glass/indium tin oxide (ITO)/ZnO...

Abstract Aiming at the defects in clinical application of tirapazamine (TPZ), this paper reports a GOX‐TPZ‐CaP@SA nanodrug delivery system. The system can enter lysosomes tumor cells through endocytosis. acidic environment induces release TPZ and glucose oxidase (GOX). When GOX catalyzes glucose, oxygen consumption is intensified tissues, providing suitable environmental conditions for TPZ. Research data indicate that synergistic effect between improves antitumor performance

Endowing fluorogenic probes with ultrahigh contrast is essential to increasing the accuracy of fluorescence sensing and imaging. Phenolate-based D-π-A fluorophores (A-DOH) belong a big family have attracted attention in probe design. However, intrinsic dilemma weak intracellular emission traditional A-DOH resulted low during live cell Herein, we present general robust approach preparing novel bright NIR living cells based on unique halogen effects. The reported chlorinated fluorophore...

Organic–inorganic halide perovskites have achieved remarkable success in various optoelectronic devices.

We report an acetone vapour-assisted method to grow single-crystalline 2D perovskite microplates and find their temperature-enhanced photoluminescence.

Quasi-2D Ruddlesden-Popper perovskites possess a tailorable quantum well structure and outstanding optical properties. Herein, we study their diverse phase-separation phenomena the resulting microcrystals (∼1 μm), which have evidently enhanced photoluminescence. Lasing based on these in vertical single-mode microcavity has also been achieved, featuring low threshold of ∼500.0 μJ/cm2 pumped by nanosecond pulsed laser (355 nm, pulse width 8 ns, 1 kHz). This work makes quasi-2D perovskite...

Abstract Activatable photosensitizers (aPSs) sensitive to specific stimuli hold potential for targeting multiple disease biomarkers and are desirable photodynamic therapy (PDT). Presented herein is the design of aPSs that can be activated fully recover from an inhibited state in presence biomarker. A designed long‐wavelength D‐π‐A photosensitizer, PS Se‐I , with highly efficient photosensitivity generation 1 O 2 was used. Caging phenolate donor a biomarker‐sensitive group provided ALP...

Organic-inorganic halide perovskite CH3NH3PbX3 (X= I, Br, Cl) quantum dots (QDs) possess the characters of easy solution-process, high luminescence yield, and unique size-dependent optical properties. In this work, we have improved nonaqueous emulsion method to synthesize CH3NH3PbBr3 QDs with tunable sizes. Their sizes been tailored from 5.29 2.81 nm in diameter simply by varying additive amount surfactant, n-octylamine 5 120 μL. Correspondingly, photoluminescence (PL) peaks shift markedly...

We propose a hybrid plasmonic photonic crystal consisting of square array dielectric nanoparticles arranged on metal film with gap inbetween. Simulations show that this supports lattice plasmon modes just like the nanoparticle array, exhibiting an extremely narrow and deep reflection dip. When interparticle spacing increases from 800 to 1000 nm, full width at half maximum plasmons decreases 21 4 lowest reflectance is close zero. The resonant wavelength highly sensitive local environment. It...

Spot size converter (SSC) plays a role of paramount importance in the silicon photonics integrated circuit. In this article, we report design reconfigurable spot used hybrid integration DFB laser diode with photonic waveguide. Our SSC consists subwavelength gratings and thermal phase shifters. Four grating tips are to improve horizontal misalignment tolerance. Meanwhile, mismatch between two input waveguides is compensated by shifters minimize insertion losses. simulated result has yielded...

Silicon nitride-on-SOI grating couplers are specifically designed for the O- and C-bands, utilizing CUMEC's advanced process platform. Through simulation, we have achieved an impressive maximum coupling efficiency of -1.4 dB -1.8 to standard single-mode fiber C-bands respectively, accompanied by a remarkable 1-dB bandwidth 70 nm 78 nm. Furthermore, conducted analysis on fabrication variation tolerance.

We design a type of broadband Silicon Nitride (SiN) power splitters with various split ratios using shortcuts to adiabaticity (STA) technique ensure the compactness and performance device. The decoupled system states are employed in double-waveguides guarantee approximate adiabatic evolution desired implemented by manipulating boundary conditions. devices show response for wide wavelength range from 1260 1360 nm have excellent robustness against fabrication errors our simulations.