Photolithography has shown great potential in patterning solution-processed nanomaterials for integration into advanced optoelectronic devices. However, photolithography of perovskite quantum dots (PQDs) so far been hindered by the incompatibility with traditional optical lithography processes where lots solvents and high-energy ultraviolet (UV) light exposure are required. Herein, we report a direct situ technique to pattern PQDs based on photopolymerization catalyzed lead bromide...

A facile one-step method was developed to fabricate luminescent CH₃NH₃PbBr₃/NaNO₃ nanocomposites. Due the space localization and protection of tight inorganic salt matrix, nanocomposites show a longer PL lifetime enhanced thermal, light, solvent stability.

Ligand-induced chirality in semiconducting nanocrystals has been the subject of extensive study past few years and shows potential applications optics biology. Yet, origin chiroptical effect semiconductor nanoparticles is still not fully understood. Here, we examine interaction with amino acids on both fluorescence optical activity chiral quantum dots (QDs). A significant enhancement observed for l/d-Cys-CdTe QDs upon all tested acids, indicating suppression nonradiative pathways as well...

Doping in perovskite is challenging and competitive due to the inherently fast growth mechanism of structure. Here, we demonstrate successful synthesis high-yield Fe-doped cesium lead halide ultralong microwires (MWs) that have diameters up ∼5 μm lengths millimeters via an antisolvent vapor-assisted template-free method. Microstructure characterization confirms uniformly doped Fe high-quality crystal MWs. Significantly, doping Fe(III) concentration can affect both MW morphology...

Abstract The acquisition of near‐infrared (NIR) spectral information is most notably accessed in the scientific analysis and industrial technology. With development artificial intelligence technology, miniature NIR spectrometers are usually required to realize compact equipment. Quantum dot spectrometer demonstrated be a promising reconstructive spectrometer; however, range limited visible due lack high‐resolution detectors quantum filters. In this work, constructed by integrating 195 finely...

Inducing apoptosis in cancer cells is considered a potential therapeutic mechanism underlying cancers. Here, chiral folic acid (FA) conjugated Cys-CdTe/CdS quantum dots (QDs) with cancer-targeting ligand were fabricated to induce vivo. Ligand-induced chirality for FA-Cys-CdTe/CdS QDs was discussed, which verified by density functional theory (DFT) simulation. Interestingly, we found that the circular dichroism (CD) signals of can effectively distinguish breast from normal cells, where sharp...

Abstract Induced chirality in colloidal semiconductor nanoparticles has raised significant attention the past few years as an extremely sensitive spectroscopic tool and due to promising applications of chiral quantum dots sensing, optics, spintronics. Yet, origin induced chiroptical effects is still not fully understood, partly because almost all theoretical experimental studies date are based on simple model system a spherical nanocrystal. Here, realization atomically flat 2D wells shown. A...

Environmentally friendly Cu 2− x S compounds exist in many different mixed phases nature, while their nanoscale counterparts can be pure phase with interesting localized surface plasmon resonance properties. Because of the complexity composition and phase, controllable synthesis nanocrystals becomes an important scientific issue colloidal chemistry. In this work, a hot‐injection method is developed to synthesize by injecting sulfur precursor into copper using oleylamine octadecene as...

Abstract Gradient‐alloyed Cd x Zn 1− Se y S @ZnS core shell quantum dots are the most popular materials used in light‐emitting diodes for liquid crystal display backlights. High‐temperature photoluminescence is an essential property determining chromaticity shifts of on‐chip type devices. In this work, quenching effect investigated by measuring steady and time‐resolved PL spectra at elevated temperatures. The thermal can be explained a thermally activated physical process, including electron...

Chiral semiconductor nanocrystals (NCs) represent a promising class of materials for various applications, including biological sensing, photonics, and spin-polarized devices. However, the comprehension mechanisms underlying ligand-induced chiroptical effects in NCs has been limited by constraints current theoretical experimental models, particularly those involving simple spherical NCs. In this study, we examined relationship between optical activity band structures core–shell dot-in-rod...

Perovskite quantum dots (PQDs) exhibit remarkable optical properties, making them highly promising for next-generation display technologies. However, achieving precise PQDs patterning is hindered by significant challenges, including the inability to achieve true three-dimensional (3D) structuring and risk of damaging delicate perovskite crystal lattice. Existing methods struggle 3D while preserving integrity. This study introduces an in situ technique using direct laser writing (DLW). By...

Excitons in colloidal semiconductor nanoplatelets (NPLs) are weakly confined the lateral dimensions. This results significantly smaller Auger rates and, consequently, larger biexciton quantum yields, when compared to spherical dots (QDs). Here we report a study of temperature dependence rate individual CdSe/CdS core–shell NPLs, through measurement time-gated second-order photon correlations photoluminescence. We also utilize this method directly estimate single-exciton radiative rate. find...

Abstract The heavy use of toxic and volatile solvents such as dimethylformamide (DMF) dimethylsulfoxide (DMSO), in the chemical synthesis perovskites is known to pose several sustainability challenges that significantly hinder their mass production for commercial applications. Herein, a polymerizable monomer solvent (4‐acryloylmorpholine, ACMO) introduced permits growth optical lithography perovskite quantum dots (PQDs) through situ polymerization. Morphological, structural, analyses show...

Because of the fundamental properties and possible applications in spin-based electronics photonics, diluted magnetic semiconductor nanowires are actively pursued. Here we report a general facile solution synthetic strategy to prepare colloidal through solution-liquid–solid (SLS) doping approach using single-source precursors. On basis this strategy, transition metal ions such as Mn Eu doped CdS were successfully synthesized characterized. The material characterizations demonstrated that...

Properly designed colloidal semiconductor quantum dots (QDs) have already been shown to exhibit high sensitivity external electric fields via the confined Stark effect (QCSE). Yet, detection of characteristic spectral shifts associated with QCSE has traditionally painstakingly slow, dramatically limiting these QD sensors fast transients. We experimentally demonstrate a new scheme achieve shot-noise-limited emission wavelength in QDs, showing feasibility for their use as local field on...

Abstract Solution‐processed core/multishell semiconductor quantum dots (QDs) could be tailored to facilitate the carrier separation, promotion, and recombination mechanisms necessary implement photon upconversion. In contrast other upconversion schemes, upconverting QDs combine stability of an inorganic crystalline structure with spectral tunability afforded by confinement. Nevertheless, their yield (UCQY) is fairly low. Here, design rules are uncovered that enable significantly enhance...

The elongated shape of CdS nanorods enables linearly polarized photoluminescence (PL) emission from the core/shell CdSe/CdS dot-in-rod (DR) nanocrystals. This work unravels role aspect ratios in PL single DRs using single-dot spectroscopy. We find that as ratio increases, quantum yield and lifetime significantly reduce, but blinking is suppressed, effect on spectrum less. correlation between degree polarization modeled by calculating band-edge exciton fine structure. when reaches 7,...

The ability to tune the size, shape, and properties of supraparticles is great importance for fundamental study as well their promising applications. We previously developed a method synthesize monodisperse ZnSe via "in situ aggregation" nanoparticles through simple hot-injection method. In present work, we show that strategy can be extended shapes supraparticles, introduce novel functional magnetic luminescence properties. Shape control manipulated with oleic acid ligands, which balances...

Upconverting semiconductor quantum dots (QDs) combine the stability of an inorganic crystalline structure with spectral tunability afforded by confinement. Here, we present upconverting type-II/type-I colloidal double QDs that enable enhancement performance near-infrared to visible photon upconversion in and broadening range relevant materials used. The resulting ZnTe/CdSe@CdS@CdSe/ZnSe possess a very high photoluminescence yield, monoexponential decay dynamics, narrow line width,...

Abstract The shell growth of large ZnSe/ZnS nanocrystals( is great importance in the pursuit pure‐blue emitters for display applications, however, suffers from challenges spectral blue‐shifts and reduced photoluminescence quantum yields. In this work, ZnS on different‐sized ZnSe cores investigated. By controlling reactivity Zn S precursors, can be tuned defect‐related strain‐released to defect‐free strained mode, corresponding blue‐ red‐shifts resultant nanocrystals respectively. shape kept...

Semiconductor quantum dots (QDs) have recently caused a stir as promising and powerful lighting material applied in real-time fluorescence detection, display, imaging. Photonic nanostructures are well suited for enhancing photoluminescence (PL) due to their ability tailor the electromagnetic field, which raises both radiative nonradiative decay rate of QDs nearby. However, several proposed structures with complicated manufacturing process or low PL enhancement hinder application...

Colloidal semiconductor nanowires are attractive materials with polarized light absorption and emissions. Solution synthesis of ultralong (several tens micro­meters) colloidal CdSe x S 1‐x homogeneously alloyed composition through a solution–liquid–solid (SLS) method reported. By varying the ratio Se/S, optical band their corresponding photoluminescence spectra can be finely tuned from 508 nm (ca. 2.45 eV) to 628 2.0 eV). In comparison low quantum yields pure CdS (less than 0.1%), exhibit...