Themed collection Journal of Materials Chemistry C HOT Papers

In optical systems for communication, sensing, and imaging, integrating optoelectronic and electronic components on-chip to develop optoelectronic applications has become the focus of future research.

Carbazole–cyanostilbene conjugates exhibit promising optical properties, including AIE and MFC. This review explores their diverse applications across various fields, highlighting their unique characteristics and potential impact.

Using thin AlO_x as dielectrics, low-voltage polymer monolayer TFTs were attained with a SS of 86 mV dec⁻¹. The resultant unipolar and complementary inverters exhibited high voltage gains of 251 V/V at V_DD = −3 V and 841 V/V at V_DD = 5 V.

Four pairs of chiral Ag₆L₆ nanoclusters, synthesized using ligand engineering with thiazithione and oxazinthione, exhibit enhanced luminescence quantum yield attributed to S⋯S interactions and demonstrate supramolecular chirality inversion regulated by peripheral methyl and phenyl groups.

C₈H₆IN₃O₄ exhibits a substantial birefringence of 0.55 at 550 nm, surpassing commercially available birefringent materials, and this phenomenon is attributed to the uniform alignment of π-conjugated [NO₃]⁻ and [C₈H₆IN₂O]⁺ groups.

Cd-free QLEDs with tunable emission from 603 to 524 nm were constructed by regulating the non-stoichiometric Cu : Ga molar ratio, and the green QLEDs showed high performance with an EQE of 5.8% and a high brightness of 7016 cd m⁻².

We used temperature-dependent spark plasma sintering to induce phase transformations of metastable 3D c-BN to mixed-phase 3D/2D c-BN/h-BN and ultimately to the stable 2D h-BN phase at high temperature, useful for extreme-temperature technology.

An artificial synaptic device based on amorphous oxides is created inspired by biological synapse, and a three-layer artificial neural network is constructed using the data of a LTP-LTD circle.

In this work, we designed a RPL material SrF₂:Eu which could achieve PL discoloration after X-ray irradiation. The SrF₂:Eu bulk was optimized to improve the imaging quality, which is the excellent candidate for time-lapse imaging.

Ambient solution-processed halide perovskite thin films are susceptible to oxygen and moisture. Composition and morphology control of the films via anti-solvents treatment, i.e., DCB, EtOH, and CB affect their crystallization and solar cell performance.

A fluorescent probe enables dual-channel selective “turn-on” detection of Hg²⁺ and Ag⁺via distinct thiophilic effects was designed. Mechanisms of this chemosensor and the opposite luminescence behavior of the molecules were carefully explored.

This research thoroughly analyzes strain sensing performance and thermal stability of metallic glass (MG) electrodes. The amorphous characteristic of MG film endows a high gauge factor and bending motion detection of the strain sensor device.

Sheet-on-sheet architectural heterojunction (DLS-2D-Co-TCPP(Fe)/ANS–rGO-0.5) with Fe–N₄ units was prepared which exhibited superior sensing performance toward NO at room temperature, including a pLOD of 100 ppb and long-term stability over 60 days.

Defect tolerance, which plays a crucial role in the outstanding photoelectric performance of hybrid organic–inorganic perovskites (HOIPs), is dynamically responsive to illumination. Continuous illumination can induce local structural reorganization leading to dynamic PL enhancement.

A family of ca. 350 double perovskites Cs₂(Ag,Na)M^IIICl₆, M^III = Bi, Sb, In, Fe, with two or three alloyed M^III cations was produced by high-throughout robot-assisted synthesis revealing non-additive compositional dependences of spectral properties.

Herein, we propose a feasible design for enhancing PLQY, SOC and achieving balanced carrier mobility of the HLCT blue emitter. The non-doped OLED base on PPIFB with higher PLQY (91%), higher SOC (14.7 cm⁻¹) and the balanced carrier mobilities.

A new surface engineering approach that allows for enhanced control over ligands by decoupling colloidal-stabilization and property-engineering ligands was developed.

TFS-TFMS was introduced to modulate the upper interface in n–i–p structured perovskite solar cells, resulting in significantly improved device performance owing to the synergistic engineering of fluorine and sulfonate functional sites.

2,6-Diaminopyridinium hydrobromide has dual functions of etching and passivation. It can peel off the outer layers and simultaneously passivate the internal crystal structure, ultimately achieving high-performance deep blue CsPbBr₃ NPLs.

We demonstrate the modulation of Auger recombination via facet engineering in CsPbBr₃ perovskite nanocrystals, where the static dielectric screening effect is revealed to prevail over the dynamic polaronic screening effect.

A performance-stable tactile neuron is developed, which integrates a stretch-insensitive triboelectric nanogenerator with an artificial neuron in a single device, and a 64 × 64 neuromorphic tactile matrix is established to process touch signals.

Terminal flexible chains in homoleptic tris-Ir(III) complexes from ethylhexyl carboxylic ester to hexyl induced dramatic differences in absorption and emission, and in particular had an opposite effect in ternary organic solar cells.

An active dual-stimulus responsive coloured cholesteric fibre that enables orthogonal modulation of reflection bands and reflectance by optical and gaseous means, respectively.

A novel superconductive structure of P2₁/m GeSH₁₄ is predicted with a T_c of 128 K at 180 GPa. It is composed of covalent hydrogen chains bridging the adjacent Ge–S–H polyhedra, favorable for stabilizing the structure and enhancing superconductivity.

Lead-free halide perovskites Cs₂SnX₆ (X = Cl, Br, I) exhibit favorable humidity sensing with a response sequence of Cs₂SnCl₆ > Cs₂SnBr₆ > Cs₂SnI₆, enabling great potential for real-time non-contact human breath and finger monitoring.

Sliding antiferromagnetic bilayers have attracted considerable attention due to their multiferroic properties coupled with layers.

Faced with a huge amount of information, the brain relies on attention mechanisms to highly select information for efficient processing.

Ce:LuAG–Al₂O₃ nanoceramics prepared through glass crystallization present an ultrahigh luminous flux (LF) of 5124.7 lm and an excellent luminous density of 4235.5 lm mm⁻² in LD-driven lighting.

The advanced synthetic methodologies for discrete chiral Au nanorods promote understanding the effect of structure parameters, intrinsic chirality and extrinsic chirality on the chiral plasmonic couplings.

Photocatalytic water splitting reactions (HER and OER) on the asymmetric surfaces of Janus MXenes with the help of intrinsic electric field (E_i).

Lightweight SSE-EVA foam (SEF) with excellent compression resilience and mechanical-thermal protection was prepared by foaming. It owned application potential in thermal camouflage and thermal storage materials.

A new 2-D 8-connected rare earth (RE) MOF based on a hexanuclear (RE³⁺)₆ SBU, the increase of the dimensionality through SCSC linker installation reactions and the turn-on of the temperature sensing capability upon these reactions are reported.

Ln-MOFs were designed for anti-counterfeiting labels by using texture codes. Moreover, three visual probes based on 1-Eu for MEAA detection are fluorescent films, RGB intelligent detection sensor platforms, and portable logic detectors.

The TADF emitter TCPP-DTPA with a multilayered π-stacked structure accelerates the RISC process and achieves extremely low-efficiency roll-off in red OLEDs.

An ionic-hydrogel based temperature sensor with anti-freezing capabilities, anti-strain interference capabilities and luminescence properties is presented.

Lead-free perovskite composites were prepared by in situ doping and crystallization. The optimized scintillators achieved improved stability, light yield and transparency, which resulted high X-ray sensitivity and low detection limit.

High-quality 2D layered BiOI crystals have been synthesized by a novel space-confined molten salt method.

As presented in the manuscript the K₂Ge₄O₉:Mn⁴⁺ can be used as a luminescent pressure and temperature sensor. The pressure sensing can be achieved based on the kinetics of the 2E state luminescence and the spectral position of the R line can be used for temperature sensing.

The selective site deposition of Ag⁺ led to the formation of Au hexagonal star plates.

This work presents a novel perovskite thin film fabrication approach based on an optical in situ spectroscopy setup and a live closed-loop feedback system to improve the reproducibility of the layer properties independent of external parameters.

In this work, PbI₂-based photodetectors with symmetric Au–Au and asymmetric Au-graphene electrode structures are made. The asymmetric PbI₂ device shows 3–4.8 times higher photocurrent compared to the symmetric device under the same light intensities.

In situ X-ray absorption spectroscopy on C-doped Ge₂Sb₂Te₅ thin films reveals that C-content increases the rigidity of the Ge–Te bond in the amorphous phase, but curiously, only at moderate doping levels.

A double-layer MXene absorber with orthogonal microstructures was designed unidirectional freeze-casting method, which yielded favorable electromagnetic wave absorption properties by tuning the thickness ratio of the parallel ends when the parallel sample was used as an impedance matching layer.

High-T_c lead-free ferroelastic semiconductor (R/S-CTA)₂SbCl₅ was obtained through an H/OH-substitution-induced homochirality strategy, and undergoes phase transition at 410 K accompanied by switching between the SHG-active and SHG-inactive states.

Printed polymer films with higher film uniformity and device-performance were obtained by regulating the Marangoni flow and contact line sliding with co-solvents of different surface tension.

Well-defined polymorph transformation sequences and novel tetragonal twin-domain patterns are found in the MPB of Dy-modified BiFeO₃–PbTiO₃ single crystals.

Johan and colleagues demonstrated antisolvent- and annealing-free PeLEDs by modulating the substrate preheating gradient. The strategy is a viable alternative to the traditional antisolvent method for promoting high-quality perovskite films.

A diffusive memristor from tea polyphenols.

Ti₃C₂T_x MXene by the surface termination modulation and subsequently the graphene oxide covalent functionalization for enhanced nonlinear optical performance across spectral (532 and 800 nm) and temporal (nanosecond and femtosecond) regimes.

Listening to the acoustic noise emitted by molecular spin crossover materials reveals both reversible and irreversible microstructural phenomena associated with the spin transition, providing a simple tool to detect structural fatigability.

The multi-mode luminescent anti-counterfeiting materials Sr₂Ta₂O₇:Tb³⁺, Tm³⁺ were prepared, which possessed DC, UC, PSL, and PersL modes.

The first integration of structure modulation and phase modulation of CLCs has been accomplished. CLCs doped with azobenzene show rapid color shifts and phase modulation dependent on different intensity light source stimuli within a few seconds.

By introducing the methyl substituent acetylacetone and benzyl substituents, Pt(II) complexes restrain Pt–Pt interactions in pure films and maintain nearly identical PL spectra with dilute solution. The maximum EQE of non-doped OLED reaches 19.6%.

Extreme blue 435 nm emission, 97% PLQY CsPbBr₃ nanoplates and up to 150 Mbps optical wireless communication data transmission rate.

The modification of a polyanionic positive electrode material LiMnPO₄ by transition metal doping was experimentally studied on the basis of carbon coating in order to address the drawbacks of low electronic conductivity and charge–discharge performance.

The NIR phosphor Sr₃SiAl₁₀O₂₀, which realizes ultra-broadband emission via dual energy transfer within two Cr³⁺ emitters and Cr³⁺ → Yb³⁺, can be used for NIR pc-LEDs, showing great potential in the fields of night-vision illumination, nondestructive surveillance, and information encryption.

Recently, hybrid double-perovskite structures have attracted attention due to their versatile multifunctional properties originating from the variety of different constituent units in these materials.

The pure Sn nanosheets were produced into nanospheres under the action of in-situ thermal field, and a heating experiment conducted on Sn and Cu interface samples, thereby elucidating the limitation of pure Sn as a solder material.

By first-principles calculations, we find that valleytronic and piezoelectric properties coexist in Janus MoAZ₃H ML materials, providing wide applications in the fields of valleytronics and energy conversion for MoAZ₃H MLs.

The impact of side chains on the performance of 2,2′-bithiazole based non-fused ring electron acceptors is investigated.

A fluorine-substituted perinone derivative exhibits better cathode interfacial modification than the chlorine-substituted one in inverted perovskite solar cells.