Themed collection Journal of Materials Chemistry C HOT Papers

Carbon-rich macrocycles and carbon nanoribbons act as unusual optical materials in the free form or when combined with other guests.

Alkali metals have been used to obtain high-performance perovskite light-emitting diodes. In this review, we present an overview of the advances in alkali metal ions applied in PeLEDs. Challenges and the outlook are presented for their future applications.

We devised single-EML SP-WOLEDs with luminescent gold(III) emitters featuring high EQE_max of 12.72%, CIE coordinates of (0.40, 0.40), and CRI of 93, which is among the best values for the single-EML SP-WOLEDs with CRI > 90 reported in the literature.

OECTs capable of undergoing a reversible modulation of ON current by up to 30% via irradiation with UV and visible light were realised via blending of a mixed ionic–electronic polymer (pgBTTT) and a photoswitching spiropyran derivative (OEG-SP).

A new donor–acceptor type circularly polarized luminescence material has been developed, and a dihedral angle engineering strategy has been demonstrated for the first time to significantly amplify the luminescence dissymmetry factors.

The BaTiO₃/MXene/PVDF-TrFE piezoelectric pressure sensor had a wide detection range and a short response time, which showed great advantages and potential in the application of human motion monitoring.

Sr₂ScSbO_5.6F_0.4:Mn⁴⁺ presents excellent thermal stability and higher internal/external quantum efficiency with application prospects in indoor plant cultivation.

Oxygen vacancy engineered SnO₂/WS₂ heterostructures are constructed by an effective hydrothermal process to improve the sensitivity/selectivity and realize low operating temperature. The response (R_g/R_a) of the hybrid to 5 ppm NO was 6.24 at 75 °C.

Device structure, photoresponsivity, diverse modes regulated photoresponse and high-resolution imaging based on van der Waals semimetal PtTe₂/semiconductor MoTe₂ junctions.

We reported a novel all-optical imaging device based on a designed 2D material (metasurface) for anisotropic 2D edge enhancements. This metasurface can work as a switchable anisotropic edge filter at broadband wavelengths.

A leaky mode resonance induced dual-band photodetector is fabricated using graphene/silicon nanowire array heterojunctions, which exhibit two peak responsivities at 430 nm and 660 nm.

A salicylaldoximate-based AIE probe TPE-D successively undergoes the formation of nitrile and the phosphorylation of phenolic hydroxyl group when detecting DCP, which will give a significant fluorescence ‘light-up’ response within minutes.

Unveiling the impact of different structural isomers of carborane-containing non-fullerene acceptors on optoelectronic properties and organic photovoltaic performance.

The materials incorporating a moderate electron-donating chiral unit (BAM) closer to the chromophore and participating in the frontier molecular orbitals distributions may achieve a balance between a large g value and high fluorescence quantum yield.

We introduce Ln³⁺ ions into all-inorganic CsPbI₂Br films. Photodetectors based on CsPbI₂Br:Yb³⁺ films achieve a D* of 4.6 × 10¹² Jones, a detection range of 300–700 nm, quick response time (640 ns) and good stability.

We report a highly-efficient method for preparing an electrically conductive adhesive (ECA) by using the upconversion nanoparticle-assisted near infrared photopolymerization (UCAP) technology.

A precise and facile fabrication of robust and flexible polymeric thin film multilayers with optical quality is achieved by iCVD.

The efficiency of force-induced dethreading of rotaxane mechanophores is controlled by the stopper size.

Two Pt(II) complexes with high-efficiency deep-red to NIR emission are gained by incorporating BO skeleton into azacycles. The EQE_max of (BOiqn)₂Pt and (BOPy)₂Pt doped OLED is 3.84% at 656/710 nm and 7.99% at 624/660 nm, respectively.

By incorporating a brominated aromatic cation as an interlayered spacer, we have prepared a 2D polar hybrid perovskite for polarization-sensitive and self-powered photodetection.

A schematic of the modification mechanism of chloroformamidine hydrochloride (CFA) at SnO₂/perovskite (PVK) interface.

Lead-free inorganic halide perovskites are non toxic and stable with unique properties making them suitable for many optoelectronic devices. We fabricated photodetectors with their thin films which demonstrated excellent photodetection performance.

A hollow Ni₂P/TiO₂ S-scheme heterojunction was designed to harvest solar energy and enhance the photoelectric effect. The Ni₂P/TiO₂ heterojunction exhibits excellent photoelectric separation effects.

X-ray photoresponse of κ-Ga₂O₃ is investigated for the first time. Results show that κ-Ga₂O₃ is a versatile material for the development of high-performance direct X-ray detectors.

A N-heterocyclic carbene based dopant can be n-doped into an organoboron polymer, achieving higher thermoelectric performance and better stability than those of N-DMBI.

This work proposed an enhanced deposition method of antimony telluride (Sb₂Te₃) thin films, which allowed facile growth at high temperatures (> 150 °C).

Printable feedstocks that can produce lightweight, robust, and ductile structures with tunable and switchable conductivity are of considerable interest for numerous application spaces.

Reliable threshold switching behaviors can be observed in VSe₂ nanosheets after an annealing method owing to the phase transition from the 1T to 2H. The VSe₂ memristor can be employed to perform Boolean logic calculations and simulate LIF functions.

2-Amino-5-chlorobenzophenone (ACB) with multiple functional groups is adopted to passivate surface defects of perovskite films for achieving efficient and stable PSCs.

An electrically responsive SiO₂/aniline photonic crystal was fabricated and proved to possess low working potential, wide color tuning range, and good stability and reversibility in response.

Fluorination of spacer cations compacts the layered halide perovskites, weakens the electron–phonon interactions, and suppresses the non-radiative charge carrier recombination processes.

Orthogonal integration of holographic and fluorescent dual-mode optical images with facile tunable emission colors has been achieved by precisely controlling the Förster resonance energy transfer and photocleavage reaction of an AIEgen.

In this work, we report a new design strategy to synthesize a double-cable polymer acceptor PT-BTP composed of a fused-ring Y-series acceptor framework as a pendant side unit and thiophene derivative as the conjugated backbone.

Control of the chemical composition and optical properties of molybdenum disulfide nanoparticles by laser ablation and fragmentation is demonstrated.

In this article, we have reported the fabrication of ∼7.5 at% Zn alloyed β-Ga₂O₃ epitaxial films and their high performance solar-blind photodetectors.

The prepattern-guided crystallization method was used to prepare array thin film transistors. The photonic synapses realized synaptic behaviour with 0.036 fJ per spike and demonstrated many important functions.

Construction of ternary RuP₂/Ti₄P₆O₂₃@TiO₂ photocatalysts for efficient photocatalytic biomass selective oxidation and water splitting.

Two pairs of enantiomorphic organic–inorganic hybrid manganese(II) halide clusters show excellent CPL properties and work as scintillators in X-ray detection and imaging.

Typical spectral responses of solar-blind photodetectors made of n-GaN/Al_0.27Ga_0.73N/(Al_xGa_1−x)₂O₃ heterostructures with Ni/Au Schottky contact.

Addition of a fullerene derivative to a PBTATBT-4F:Y6 blend significantly enhances cell stability, which retained 90% of the initial PCEs (13–14%) even after storage in air for 6 months, compared to only 20% retention for the binary device.

(Y_0.85−xLa_0.15)₂O₃:xEu transparent ceramics have good sensitivity, low detection limits and excellent spatial resolution (18.0 lp mm⁻¹), presenting great potential for high-resolution X-ray imaging applications.

The photovoltaic performance of three chlorinated NFAs based on a selenium heterocyclic core (namely BTSeIC-2Cl-γ, BTSeIC-2Cl-mix and BTSeIC-4Cl) were researched by precisely regulating the number and position of end-group chlorine atoms.

We demonstrated the aggregation-enhanced emission and circularly polarized luminescence of chiral 1,1′-bi-2-naphthol-substituted boron dipyrromethene derivatives in the red and near-infrared regions.

Cost-effective fabrication of efficient metal halide perovskite light emitting diodes are realized by using a hole injection monolayer, which is demonstrated to be highly effective for hole injection and radiative recombination.

Exposure to oxygen and light leads to a remarkable performance improvement in the case of highly-defective metal halide perovskite solar cells.

High performance asymmetric supercapacitor assembled using the S-VSe₂/CNT positrode and BCN negatrode.

A facile synthesis strategy of multi-component functional synergy absorbers with a minimum reflection loss value (RL_min) of −51.74 dB at only 1.9 mm (11.12 GHz) and the efficient absorption bandwidth (EAB) of 4.28 GHz at 1.4 mm.

We report, for the first time, the growth of RbCu₂Br₃ crystals and investigate their macroscopic transition from blue light emission to dazzling orange light due to thermally induced phase transition.

Luminogens without recognizable luminophores are attracting increasing attention owing to their particular photophysical properties and outstanding biocompatibility features.

An inorganic/organic CABB/Ni-MOF hybrid photocatalyst was fabricated. Due to the efficient charge separation, high reduction potential preservation, and the improved CO₂ adsorption, the CABB/Ni-MOF hybrid showed high CO₂ photoreduction activity.

A new green light-emitting phosphor with a PLQY of 70% was prepared by doping Cu⁺ into Cs₂MnCl₄. The WLED packaged by mixing commercial red and blue phosphors with Cs₂MnCl₄:0.1Cu⁺, exhibits a high CRI (R_a = 93) and low CCT (4080 K).

A robust network structure of single-molecule magnets that exhibits perpendicular magnetic anisotropy preferred for memory devices was constructed utilizing coordination chemistry at the air–liquid interface.

Following annealing at sufficiently high temperatures, well-controlled thin-film bilayers exhibit thermal changes in phase-composition, phase-volume and interfacial roughness that are reversible, irrespective of the starting layer compositions.

The all-fused-ring molecules with near-infrared absorption and high stability are developed. The organic solar cells by using these molecules as electron acceptors exhibit a PCE of 11.4% and high device stability.

An innovative “layer-by-layer” building strategy is demonstrated to prepare a responsive polymer based metal–insulator–metallic nanoarray (MIMn) for dynamic plasmonic color displays.

Spinel Mn_1.4Co_0.9Ni_0.5Cu_0.2O₄ film thermistors have been prepared on ultrafine aramid fibers using a photocrystallization. The rapid and accurate temperature responses of the fiber thermistors are promising for microscopic temperature sensors.

Fine control of the photon emission of Eu²⁺ activated luminescent materials is essential for advanced optoelectronic applications.

Enhanced tunable mechanoluminescence (ML) is obtained in orthorhombic phase compound LiYGeO₄:Bi³⁺,Tb³⁺. An anti-counterfeiting device is designed, which demonstrates the potential application prospects in the dynamic anti-counterfeiting field.

We present a model enabling the simulation of doped polymers in the vicinity of water and ions taking into account large electronic rearrangements coupled with slow dynamics.

To explore radar/infrared compatible stealth materials, indium tin oxides were prepared and showed high-efficiency microwave absorption and infrared stealth properties.

We provide a facile pressure engineering to achieve the optical control of Mn doped 2D perovskite (PEA)₂PbBr₄ NCs. A successive bandgap narrowing and marked piezochromism which changes emission from orange to bluish violet were realized.

Developing visible approaches to real-time monitoring of kinetic traps within the thermodynamic equilibrium process is of great importance for fundamental research into dynamic supramolecular chemistry.

Dual-response mechanoluminescence (ML) enables light emission upon both the application and withdrawal of mechanical stress, which can provide novel opportunities for stress-sensing.

Using a twisting linker strategy, stable NUV luminogens are prepared with nearly quantitative luminescence. Nondoped OLEDs are fabricated using the dyes as emitters and NUV electroluminescence is achieved with a maximum EQE of 6.97% and a small FWHM of 48 nm.