Themed collection Journal of Materials Chemistry C HOT Papers

This review provides a comprehensive overview of the molecular engineering techniques used to control polarity in two-dimensional materials and their applications in optoelectronic devices.

Alternating current electroluminescent (ACEL) devices have become an important direction for the development of visualized smart wearable e-textiles due to their advantages of light weight, flexibility, easy integration, and convenient processing.

Absorption spectra of photoreceptor pigments together with corresponding activators for plant growth LEDs.

This review systematically summarized the synthesis approaches towards both polycrystals and nanocrystals, and discussed the crystal/electronic structure, luminescence principle, and optimized strategies of lanthanide-based Cs₃LnCl₆ metal halides.

Light-driven self-organized ionogel patterns with modulus gradients for ultrasensitive, customizable sensing.

Mn-doped CsBr (Mn²⁺:CsBr), along with phase-engineered Cs₃MnBr₅ and CsMnBr₃ perovskite nanocrystals, were synthesized using a simple and rapid microwave-assisted method that allows for tunable emission colors and high color purity.

Adjacent compensated codoping (alloying) is presented as an alternative approach to modify the electrical and optoelectronic properties of semiconductors.

Localized electron transport channel is developed in inverted PSCs with nanoscale phase-separated PM6:PCBM to inhibit interfacial recombination. Resulting PSCs exhibit high efficiency of 25.60% with good stability.

An in situ integrated method is used to measure the thermoelectric performance of Bi₂Se₃ thin films. The coupling mechanism between thermal rectification effect caused by structural regulation and thermoelectric parameter is tentatively explored.

A new non-fullerene acceptor, CH-TCl, introduced as the third component, optimizes the active layer morphology, enhances charge transfer, and increases the open-circuit voltage of organic solar cells.

Reservoir computing (RC) using a Pt/Gd-doped CeO₂/CeO₂/Pt memristor is systematically investigated, where its time-dependent weight updates and nonlinear decay characteristics are critical for extracting spatiotemporal features in RC applications.

Hg₂(SeO₃)(TeO₃), a new tellurite–selenite birefringent crystal, showcases a broad transparency range, large birefringence, and high thermal stability, positioning it as a promising birefringent material.

Nb₂O₅ MPA-based PEC PDs exhibit an R of 146.44 mA W⁻¹ under weak 254 nm light, an ultrahigh rejection ratio of 22 306, and good UV photoresponse in acidic and alkaline electrolytes and simulated seawater at 5, 25 and 45 °C.

A mold-embedded growth method is presented for the batch production of organic scintillating single crystal fibers (SCFs). These SCFs can be integrated into a pixelated scintillator array, showing high performance in neutron detection.

Crystalline p–n heterojunctions with phase-separated heterostructures are fabricated using a one-step drop-casting strategy. The as-prepared artificial synaptic devices achieved a validation accuracy of over 97% on the MNIST dataset.

Topological [2+2] cycloaddition of halogenated styrylpyrylium takes place in crystals even when the distances between olefins exceed 4.2 Å due to the transient proximity induced by the conformational variability upon irradiation.

The study on Bi-doped LiYGeO₄ PersL reveals a ∼6.05 eV direct bandgap, supported by hybrid DFT calculations. Li loss during synthesis was confirmed by elemental analysis. Excitation to the MMCT enables UV PersL (peaked @ 358 nm) for up to 7 hours.

The shielding effectiveness and underlying mechanism are presented, demonstrating the tunable EMI response of the conducting ceramic composite (CCC) system.

We developed a self-powered photodetector using a SAM interlayer for defect passivation and electron blocking. The device shows low dark current, an on/off ratio of 7.6 × 10⁶, detectivity of 2.74 × 10¹² Jones under 365 nm light.

Organic field-effect transistors were fabricated using thieno[2,3-b]thiophene derivatives with alkyl side chains. The resulting devices exhibited well-defined surface morphology, superior air stability, and a notable hole mobility of 0.42 cm²/V s.

A novel small molecule acceptor (TQpp) was developed for VIS-SWIR broadband photodetection. The TQpp-based device achieves 18.4% EQE and 1×10¹² Jones at 1100 nm, enabling high-precision real-time pulse monitoring under ultralow 1064 nm illumination.

Hollow MoS₂ nanospheres were synthesized via a scalable hydrothermal method. High specific capacity and cycling ability were achieved in intermediate- and high-temperature Li batteries. The working mechanism of MoS₂ in intermediate- and high-temperature Li batteries was revealed.

The cation disorder over the two crystallographic sites, M_octO₆ and M_pyrO₅, in the SmCr_1−xFe_xTiO₅ mullite-like structure is shown to be the main parameter that governs the magnetic ground state, from long range antiferromagnetism to spin glass.

A photo-driven all-2D vdWs MESFET utilizing NbSe₂/MoS₂ heterostructures achieves concurrent optimization by decoupling gain and carrier lifetime, delivering high responsivity (9.56 A W⁻¹), fast response (206 μs), and ultralow dark current (2.9 pA).

The hierarchical carbon–ceramic fibrous aerogel with interconnected networks and a core–shell skeleton demonstrate exceptional promise for broadbandmicrowave absorption in extreme environments.

The rapid, sensitive, and efficient detection of nitroaromatic explosives is crucial for human health and public safety, particularly in detecting trace explosive vapors.

The strategy of cationic modification with planar groups contributes to both the transformation of a centrosymmetric structure to a non-centrosymmetric structure and the creation of a large optical anisotropy.

To overcome the challenge of scalable IR-transparent top contacts, we introduce a Ag NW–PVA film with >70% IR transmittance and ∼11 Ω sq⁻¹ resistance. Integrated with quantum dots, it enables high-detectivity (∼2.9 × 10¹¹ Jones) IR photodiodes.

A hydrophilic upconversion velocimetric nanoprobe excited at 808 nm was designed and fabricated. By introducing an energy migration process, the velocity sensitivity was promoted to a record value.

Super-wide-range emission spectrum tuning was achieved in the Ni²⁺ doped double perovskite structure by crystal field engineering of cationic substitution.

An effective design strategy for creating imidazo[1,2-a]pyridine-derived luminogens is proposed, offering a dependable avenue for building TADF-DSE materials for applications in OLEDs and cell imaging.

We report metal-free pyroelectric materials with tunable pyroelectric via molecular design. The top candidate enables self-powered X-ray detection through photo-pyroelectric effects. This work advances the development of optoelectronic materials.

The transition from a single-phase to a mixed-phase thin film forms heterogeneous interfaces that significantly enhance solar-blind photodetector performance.

LEGO®-inspired fabrication methods for high performance temperature sensors and fire alarm.

The down-shifting emission and the up-conversion emission in Sb³⁺/Yb³⁺/Pr³⁺ co-doped Cs₂NaYCl₆ double perovskites show excellent multimode luminescence and anti-thermal quenching behavior with increasing temperature.

The nanoplatelets in polar solvents are created with the assistance of HCl acid and O-diphenylphosphinylhydroxylamine. And they can remain optical property after 15 days and 80% of emission intensity after 1 hour of UV irradiation.

The electron affinity of TCNQ and F4TCNQ  is pivotal in enhancing the interfacial charge collection and optimizing the energy-level alignment of hole transport layer (HTL)-free inverted perovskite solar cells.

The changes in the luminescence properties of the Eu³⁺ ions associated with the thermally induced phase transition in LaGaO₃:Eu³⁺ enables the development of the highly sensitive ratiometric luminescence thermometer.

2,5-Substituted silole-D–A-type structures realize hybridized local and charge-transfer excitation in molecules, in which a more balanced hybridization results in efficient OLED applications.

A series of B-spiro-N TADF emitters were prepared using an intramolecular locking strategy, demonstrating a correlation between donor–acceptor strength and photophysical properties, particularly showing aggregation-induced emission enhancement.

Ir(III) carbene complexes bearing bulky 2-xylenyl substituents were synthesized and utilized in OLED fabrication. The f-ct9ax-based hyper-OLED exhibited narrowband blue emission with a maximum EQE of 31.9%, and an EQE of 20.9% at 1000 cd m⁻².

We designed a solar-blind UV photodetector based on In-doped Ga₂O₃ arrays that demonstrates competitive performances with excellent photoelectric response times of 24.8 ms (rise) and 27.6 ms (decay), and high detectivity (1.55 × 10¹⁴ Jones).

Schematic diagram of EMWs absorption mechanism of PVDF-based composite fabrics.

Despite significant advancements in the use of composite materials derived from metal–organic frameworks (MOFs) for electromagnetic wave absorption, achieving the inherent electromagnetic shielding properties of MOFs remains challenging.

Rational ligand engineering of AIE-active iridium(III) complexes for tunable emission, reversible mechanochromism and anti-counterfeiting.

The fastest relaxation time of the LPV of SnSeS/p-Si is about 0.48 μs, the cutoff frequencies (3 dB) can exceed 20 kHz.

Thienyl-based acylhydrazone photoswitches isomerize also in the solid state and adopt a stable triplet ground state in the switched form, which can trigger radical reactions.

Two indandione-terminated quinoidal compounds with fused hexacyclic thiophene-thieno[3,2-b]thiophene-thiophene as the core have been synthesized. The two compounds showed low bandgap and electron transport behaviour.

A high Q-factor plasmonic metasurface-based platform is capable of achieving intrinsic chiral response and imaging-based molecular-fingerprint detection.

Heteroleptic tetrahedra engineering has been used in non-π OIMHs and resulted in high-performance phase-matchable UV nonlinear optics.

Wasted biomass upcycling is an environmentally friendly approach that contributes to protecting the Earth.

For the first time, NiPSe₃, CoPS₃, and CrPSe₄ nanosheets were employed as tunable SAs in 1 μm bulk pulsed lasers, enabling a CW-pumped PQS laser, a pulsed-pumped PQS laser, and a QML laser, respectively.

Interpretable and uncertainty-aware machine learning framework for the design and discovery of high-performance lead-free piezoceramics.

The discovery of the novel Gd₃Co_1+xNi_1−x compound is reported. It is shown that the magnetocaloric properties are among the best in its working temperature range and Co/Ni substitution tunes the working temperature without compromising performance.

Flexible conductive elastomer materials are promising for applications in wearable, flexible sensor devices, human motion monitoring, and other fields.

A surface cooling strategy was adopted, which suppresses Sn loss and facilitates Se diffusion during the selenization process, thereby optimizing the metal element distribution and photovoltaic performance of the CZTSSe absorbers.

Use of an o-F-PEABr ligand containing an intramolecular hydrogen bond can effectively suppress low-n phases in quasi-2D perovskites. The resultant light-emitting diodes achieve a maximum efficiency of 7.55% and a pure blue emission at 475 nm.

A triboelectric nanogenerator based on the CAU-10-(SO₃H)₀.₀₈(OH)₀.₉₂/PVC composite film, exhibiting excellent moisture resistance and cycle stability, was designed and successfully applied to water electrolysis for hydrogen production.

Al₁₁Ce₃ intermetallics with porous network structures are fabricated, which present excellent adsorption and catalytic properties for polysulfide conversion, and show stable electrochemical properties as sulfur host networks for Li–S batteries.

Electrolyte-gated transistors (EGTs) with organic polymer electrolytes are promising candidates for wearable bioelectronic devices, owing to their inherent flexibility and biocompatibility.