Themed collection 2019 Journal of Materials Chemistry C Most Popular Articles

We have synthesized fifteen inorganic and hybrid organic–inorganic non-toxic A₃Bi₂X₉ compounds (A = K⁺, Rb⁺, Cs⁺, CH₃NH₃⁺ and HC(NH₂)₂⁺; X = I⁻, Br⁻, Cl⁻) through dry mechanochemistry.

The strategy of turning ferroelectric into relaxor is feasible and effective to boost the energy density and efficiency for sodium bismuth titanate-based bulk ceramics.

Tunable negative permittivity and relaxation-type dispersion for permeability were evidenced in yttrium iron garnet/polypyrrole metacomposites.

Stretchable and wearable strain sensors based on Ag nanodendrites with high stretchability and sensitivity are fabricated by directly screen-printing technology.

Ordered ZnO/NiO heterojunction arrays prepared via electrospinning using three-assisted-electrodes were achieved for high-performance self-powered ultraviolet photodetectors.

Self-doped polymer cathode interface materials for organic solar cells have been widely investigated to enhance the ohmic contact between the electrode and the photoactive layer.

Three novel porous carbon-nitride nanosheets with C₇N₆, C₉N₄ and C₁₀N₃ stoichiometries are predicted.

Ultra-sensitive OTFT based NO₂ sensors with a limit of detection of 1.93 ppb were realized by controlling and regulating the microstructures of TIPS-pentacene semiconducting films via solvent engineering.

A kirigami-based graphene–polymer hybrid nanocomposite is realized by a laser direct writing technique for reliable skin-inspired strain sensors, presenting almost no performance degradation even after >60 000 stretching cycle tests.

Core@shell structured flower-like Co_0.6Fe_2.4O₄@MoS₂ nanocomposites and the main possible pathways of microwave absorption, strong absorption ability and broad absorption bandwidth.

A stable narrow-band green phosphor MgAl₂O₄:Mn²⁺ peaking at 525 nm with a full-width at half-maximum of 35 nm and a quantum efficiency of 45% upon 450 nm blue-light excitation is demonstrated, and which has good promising for wide color gamut backlight display.

Non-symmetric alkyl/polyfluoroalkyl viologens with electrochromism in the smectic phase and mesomorphism of bent core oxadiazolyl viologens with hampered electrochromism.

Detailed first-principles calculations show that the O-vacancy-line (OVL) defects can alter nonmagnetic armchair-edged Ti₂CO₂ nanoribbons to obtain novel magnetism, flexibly tunable spin-resolved carrier mobility, and high-performance magnetic device behaviors.

In recent years, two-dimensional (2D) organic–inorganic perovskites have been attracting considerable attention because of their unique performance and enhanced stability for photovoltaic solar cells or photoluminescent devices.

Fully carbon-based f-MWCNT-g-rGO with a hierarchical structure was built to fabricate highly thermally conductive polyimide nanocomposites by electrospinning.

The time-resolved photophysical analysis of a multi-color-changing mechanochromic luminescent compound has been disclosed, which reveals distinct different emission paths to boost TADF and RTP of the emitter depending on its molecular conformations.

Mechanism of %RH sensing using aero-gel based CeO₂ nanoparticles.

A PSS-rich PEDOT:PSS transparent electrode is proposed to greatly enhance the carrier balance in OLEDs by its hole buffer effect.

Simple aliphatic amine additives are shown to react with PbI₂ in perovskite inks to form amido Pb and alkylammonium species.

The diffraction limit restricts the smallest diameter of a wave's focal spot in a homogeneous medium to no less than half of the operating wavelength.

Red- and blue-shifted mechanochromic luminescence (MCL) and single-particle level observation of tricolor MCL of phenanthroimidazolylbenzothiadiazoles are described.

High energy density was achieved by designing a AgNbO₃ based lead-free system.

The 0.94(BNT–BST)–0.06KNN ceramic possesses an excellent stored energy storage density (W_s = ∼3.13 J cm⁻³), a recoverable energy storage density (W_r = ∼2.65 J cm⁻³), and maintains a relatively high efficiency (η ∼ 84.6%).

Warm white LEDs with high color-rendering were achieved using Ca₉LiY_0.667(PO₄)₇:0.03Eu²⁺,0.10Mn²⁺ phosphors.

Energy transfer from Tb³⁺ to Eu³⁺ was observed and verified in a warm white light emission phosphor SZYP:Tb³⁺,Eu³⁺ with high thermal stability.

The large efficiency loss for the SGT-023-based device with a stronger electron-withdrawing pyridothiadiazole unit could be ascribed to a fast charge recombination rate caused by the tilted adsorption mode on the TiO₂ surface.

A 3D graphene nanoplatelets/reduced graphene oxide foam/epoxy nanocomposite exhibits superior electromagnetic interference shielding and excellent thermal conductivity.

A single-component white phosphor was realized via Eu³⁺-Doping inside Sr₃ZnTaO₉(SZT). Eu³⁺-doping induces structural variations of SZT and its luminescence emission intensity is remarkably enhanced and color rendering is consequently improved.

Waterborne epoxy coatings (WECs), with significant anti-corrosion and self-healable performance were obtained through electrostatic self-assembly of graphene oxide (GO) and phosphate (PO₄³⁻)-intercalated hydrotalcite (PIH).

Polyacrylic acid hybrid hydrogel with nano barium ferrite as a cross-linker exhibits stable piezoresistive sensing performance with negligible hysteresis loops.

I–V curves of CA2 and CA3 were drawn using experimental data, a developed normal model and a theoretical normal model.

An ultrahigh recoverable energy density was achieved in rare-earth-modified silver niobate lead-free antiferroelectric ceramics via local chemical pressure tailoring.

Novel carbon-based nonlinear optical (NLO) materials were designed by doping single alkali metal atoms into the surface of graphdiyne (GDY), rather than graphene and graphyne, because AM@GDY (AM = Li, Na, K) possesses an exceptionally high first hyperpolarizability (β_tot), especially in the case of K@GDY.

A trap-mediated solution-processed small molecule based artificial synaptic device is presented. This work reveals great potential for a small molecule based artificial synapse to serve in neuromorphic computing.

The lab-synthesized hierarchical porous Co/C crabapples demonstrated enhanced electromagnetic wave absorption.

Isothermal recovery of a mechanoresponsive chiral oligo(p-phenylenevinylene) derivative is demonstrated, where branched chiral chains facilitate the supramolecular chirality and mechanochromic response.

Ultralight CoNi/rGO aerogels exhibit excellent microwave absorption performances at an ultrathin thickness of 0.8 mm.

Relaxor ferroelectrics are promising candidates for pulsed power dielectric capacitor applications because of their excellent energy-storage properties.

A facile random copolymer strategy based on poly(styrene-ran-methyl methacrylate) (PS-r-PMMA) is proposed for the preparation of highly conductive and mechanically elastic solid-state gel electrolytes.

Smart, high-power ultraviolet (UV)-B light-emitting diodes (LEDs) are demanded for real world applications, including vitamin D3 production in human skin (295–304 nm), immunotherapy (310 nm) and enriching phytochemicals in plants (310 nm).