To industrialize printed full-color displays based on quantum-dot light-emitting diodes, one must explore the degradation mechanism and improve operational stability of blue electroluminescence. Here, we report that although state-of-the-art quantum dots, with monotonically-graded core/shell/shell structures, feature near-unity photoluminescence efficiency efficient charge injection, significant surface-bulk coupling at level, revealed by abnormal dipolar excited state, magnifies impact...

High-performance sensors for toxic gases have been the goal of research in industry. In this paper, adsorption seven target gases, NO, NO2, NH3, H2S, CO, CH4 and HCHO, on intrinsic modified In2O3 (110) surface is investigated based Density functional theory (DFT). Relevant parameters such as energy, charge transfer, distance band gap are calculated a combination density states (DOS), deformation (DCD) frontier molecular orbital employed to investigate application gas sensing. Theoretical...

Co-Catalyzed <italic>Z</italic>-selective hydrosilylation of terminal alkynes produces (<italic>Z</italic>)-β-vinylsilanes, which are further converted to (<italic>Z</italic>)-disubstituted alkenes by Pd-catalyzed cross couplings.

Incorporating the silicon element into bioactive organic molecules has received increasing attention in medicinal chemistry. Moreover, organosilanes are valuable synthetic intermediates for fine chemicals and materials. Transition metal-catalyzed C–H silylation become an important strategy C–Si bond formations. However, despite great advances aromatic C(sp2)–H silylations, catalytic methods aliphatic C(sp3)–H silylations relatively rare. Here we report a pincer ruthenium catalyst...

The adsorption properties of Ag embedded HfS2 (Ag-HfS2) monolayers to SF6 decomposition gases (SO2, H2S, HF, SOF2 and SO2F2) were investigated based on density functional theory (DFT). atoms are stably bound the sulfur vacancies monolayer HfS2, still maintain semiconducting by analyzing deformation charge (DCD), band structure states (DOS). geometry, transfer DOS these five gas molecules Ag-HfS2 discussed in detail. studies show that has excellent sensitivity for H2S SO2F2 gases, with...

Quantum dot light-emitting diodes (QLEDs) have attracted increasing attention due to their excellent electroluminescent properties and compatibility with inkjet printing processes, which show great potential in applications of pixelated displays. However, the relatively low resolution technology limits its further development. In this paper, high-resolution QLEDs were successfully fabricated by electrohydrodynamic (EHD) printing. A quantum (QD) emission layer was formed an insulating Teflon...

A facile approach which is based on the different functionalities in graphene focused facilitating polyamide 6 (PA6) to graft onto surface form homogeneous nanocomposite was well-distributed, leading increasing physico-mechanical properties of composite. Graphene oxidized oxide (GO), then reacted with amine compounds obtain bonding functional groups –NH2 and –(CH2)6NH2. The functionalized grafted by PA6 fabricated situ polycondensation caprolactam (CPL) connection graphene, their continuous...

First-principle calculations were carried out to simulate the three decomposition gases (SO2, SOF2, and SO2F2) of sulfur hexafluoride (SF6) on Ga-doped MoS2 (Ga-MoS2) monolayer. Based density functional theory (DFT), pure multiple gas molecules (SF6, SO2, built optimized most stable structure. Four types positions considered it was found that Ga dopant preferred be adsorbed by top Mo atom (TMo). For best adsorption effect, two ways SO2F2 approach doping model compared favorable mode...

The aging phenomenon is commonly observed in quantum-dot light emitting diodes (QLEDs), involving complex chemical or physical processes. Resolving the underlying mechanism of these issues crucial to deliver reliable electroluminescent devices future display applications. Here, we report a reversible positive that device brightness and efficiency significantly improve after operation, but recover initial states long-time storage mild heat treatment, which can be termed as warming-up effects....

Palladium oxidative addition complexes (OACs) are state-of-the-art catalysts for many C–C and C-heteroatom cross-coupling reactions, but altering the ancillary ligand identity (i.e., phosphine, N-heterocyclic carbene) often requires a bespoke synthesis. This has limited modularity accessibility of these ideal catalysts. We report simple admixture approach combining bench-stable organopalladate salt with mono- or bidentate to generate OACs within minutes at room temperature. High yields...

GO firmly planted on the surface of quartz sand, will not fall off and cause secondary pollution. A series experiments show that coated sand (GOS) granules have a strong adsorption performance for organic matter heavy metal ions.

The operational stability of the blue quantum dot light-emitting diode (QLED) has been one most important obstacles to initialize its industrialization. In this work, we demonstrate a machine learning assisted methodology illustrate QLEDs by analyzing measurements over 200 samples (824 QLED devices) including current density–voltage–luminance (J-V-L), impedance spectra (IS), and lifetime (T95@1000 cd/m2). is able predict with Pearson correlation coefficient 0.70 convolutional neural network...

Abstract New tricyanopyrroline (TCP) chromophores with rigid–flexible dendron were prepared for second‐order nonlinear optical (NLO) application. The fully characterized using ultraviolet‐visible spectroscopy, nuclear magnetic resonance spectroscopy and mass spectrometry. Thermal gravimetric analysis (TGA) revealed that the had excellent thermal stability. Large λ max high solvate chromic effects large nonlinearity. electro‐optic coefficients ( r 33 ) measured in chromophores‐doped...

Thus far, no reports have been made on the correlation between photovoltaics and electroluminescence in light-emitting diodes. With machine learning assistance, we here illustrate relationship of quantum dot diodes (QLEDs) by analyzing measurements over 200 devices, including J–V–L, photovoltaics, time-resolved (TREL) test. By applying a decision tree analysis 17 extracted features test TREL curves, clarify key open-circuit voltage (Voc) short-circuit current (Isc) under varied illuminated...

A general and efficient method for the synthesis of tertiary amides has been developed <italic>via</italic> copper-catalyzed aerobic oxidative amidation amines.

The synthesis and olefin polymerization behavior of a series new phosphine-iminoquinoline iron complexes is described. Upon activation, the are highly active for ethylene polymerization, producing low molecular weight (MW) linear polyethylene (PE) with activities up to 108 g PE/((mol Fe) h). This activity comparable that most bis(imino)pyridine catalysts heterogeneous Ziegler–Natta catalysts. MWs distributions (MWDs) resulting polymers can be controlled by modification catalyst structures....

Abstract Summary: Liquid crystalline epoxies with a biphenyl mesogenic group have been widely studied although it is still in contention as to whether the diglycidyl ether of DGEBP shows thermotropic phase. DEPBP was synthesized by partial oxidation and liquid properties were investigated. Despite their similar structures molecular weights are quite different. has distinct weight, while weight distribution. DEPEBP also characterized investigate influence flexible spacer. By incorporation...

The goal of fine-grained propaganda detection is to determine whether a given sentence uses techniques (sentence-level) or recognize which are used (fragment-level). This paper presents the sys- tem our participation in sentence-level subtask shared task. In order better utilize document information, we construct context-dependent input pairs (sentence-title pair and sentence- context pair) fine-tune pretrained BERT, also use undersampling method tackle problem imbalanced data.

Palladium oxidative addition complexes (OACs) are state-of-the-art catalysts for many C¬–C and C–heteroatom cross-coupling reac-tions, but altering the OAC ancillary ligand identity (i.e., phosphine, N-heterocyclic carbene) often requires a bespoke synthesis. This has limited modularity accessibility of these ideal catalysts. We report simple admixture approach combining bench-stable or-ganopalladate salt with mono- or bidentate to generate OACs within minutes at room temperature. High...

Organic nonlinear optical materials have been widely explored because of their advantages in the design with large electro-optic coefficients used fabrication novel optoelectronic and telecommunication devices. However, huge dipole–dipole interactions between organic chromophores limited further improvements long-term material stability. Here, a polymer based on poly(aryl ether ketone) was designed prepared to enhance achieve higher This has relatively high glass transition temperature...

In this letter, we consider a practical heterogeneous traffic scenario in industrial Internet of Things (IIoT), where multi-functionality robot performs proximity surveillance task concurrent with data collection from multiple sensors. While ensuring video resolution constraint for streams, the also adaptively selects subset sensors collection, order to guarantee queue stability particular, trajectory subjects no-go zone due geography restrictions IIoT, which breaks convex property feasible...