Themed collection Journal of Materials Chemistry C HOT Papers

Recent progress in cross-linkable organic hole-transporting materials (HTMs) in perovskite-based solar cells (PSCs) and light-emitting diodes (PeLEDs) has been systematically summarized and discussed.

To break the limitations of traditional molecular materials in electronic devices, especially in organic field-effect transistors (OFETs), developing monolayer molecular crystals (MMCs) with the ultimate thickness is crucial.

The composition and microstructure control of Sm₂Fe₁₇N₃ powders lays the foundation for the enhancement of magnetic properties, which is mainly ascribed to the optimization of the intrinsic magnetic properties and domain structure.

This review explores recent advancements in Electrohydrodynamic (EHD) deposition techniques for the fabrication of organic thin-film transistors, highlighting their impact on device performance and potential applications.

This review provides recent advances in flexible iontronic pressure sensors including strategies to enhance sensing performances and their applications and discusses future directions for implementing these advancements in practical applications.

Wound infection has always been a huge threat to human health.

We here discuss the development of inorganic and organic superconductors having a structural chirality.

Flexible electronics has been widely recognized as the future of electronics for a broad range of applications, which is also the foundation for wearable devices that can go or even seamlessly integrate with the human skin.

The research progress of Ce³⁺/Eu²⁺ doped phosphors that can be excited by violet light, including the structural models, composition regulation, and spectral tuning, is summarized.

This article provides a comprehensive review of chiral quantum dots used for bioapplications. The chiral mechanisms, g factor and some bioapplications are also discussed.

We summarize the molecular design of photoresponsive liquid-crystalline polymers, manipulation at multiple scales and various applications based on their intrinsic properties, providing an opportunity for future development in this field.

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.

A strain-sensitive neuromorphic device mimics mechanoreception, adapting to skin-like sensitivities. Embedded Au microwires in PDMS detect strain and display neuromorphic functionalities, closely replicating biological mechanosensory functions.

Substituents at peripheral cyclopenta-fused polycyclic aromatic hydrocarbons are important to regulate the anti-aromaticity, energy levels and charge transport polarity.

A new strategy to disclose the relationship between π–π stacking without exogenous ICT and photophysical properties was propounded through the construction of smart piezochromic materials with a discrete π–π dimer and high-pressure technique.

We demonstrate online and offline learning as well as associative learning such as in Pavlov's dog experiments using the non-volatile and volatile properties of HfSiO_x-based FTJs.

Two indolo[3,2,1-jk]carbazole-based nanographenes (ICz-NGs) were designed and synthesized. Organic light-emitting diodes employing these ICz-NGs as emitters exhibited blue and green emissions with small full width at half maxima of 18–23 nm.

“Supramolecular chirality induction” from cholate assembly, along with non-covalent sensitization of various lanthanide emission, provides an efficient induction of tunable CPL in lanthanide-based soft materials.

We report a novel synthetic route to a series of fused acene derivatives, in which linear extension of the fully conjugated core proves to be an efficient method to tune optoelectronic properties.

The thickness of the quantum well determines the photosensitivity to linearly polarized light in metal-halide perovskite single-crystal devices.

Two benzothiadiazole-based COFs, constructed using “two-in-one” monomers, exhibit significantly different photocatalytic hydrogen generation performances due to their distinct imine bond orientations.

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.

This study develops chiral Eu(NTA)₃(BINAPO) complexes as X-ray scintillators with unique circularly polarized luminescence and imaging potential, advancing X-ray-activated enantioselective photocatalysis for diverse environmental applications.

Lu-MOFs with formic acid as the sole ligand were synthesized by a formamide hydrolysis reaction. The luminescence color and intensity of Lu–Eu-MOFs-bipy can be controlled by the energy competition and transfer between 4,4′-bipyridine and Eu³⁺.

A facile membraneless method for detecting alkali-metal cations was developed by adding ionophores (crown ethers: 18C6 or 15C5) to a polymer matrix (p(g2T-TT)) as the active layer in organic electrochemical transistors.

The WS₂/ZnO QD heterojunction photodetector achieves high responsivity and ultra-fast response speed through the coexistence of charge transfer and non-radiative energy transfer.

A photothermoelectric (PTE) photodetector (PD) is crucial for realizing broadband detection, which is vital for the next generation of integrated multifunctional photodetectors.

BOBTFB, a blue fluorescent emitter has been synthesized, and used as an exciplex accepter which is combined with different donors (TCTA, TAPC, m-MTDATA) to produce emission of different colors (blue, green, yellow, white).

Bi₃O₄Br:Yb³⁺,Er³⁺ (BYE-OV) nanosheets generate more oxygen vacancies under UV irradiation, causing the color to change from light yellow to brown-black. At the same time, the generated intermediate energy levels enhance upconversion luminescence.

The sensing principles, performance, and applications of the iontronic sensor in posture assessment in this work.

A cascaded artificial light-harvesting system based on the platinum(II) metallacycle was constructed, which displayed high sensitivity and specificity for biothiols.

An electrically-pumped low-threshold WGM microlaser diode based on a well-fabricated n-AlGaN/n-ZnO:Ga MW/Pt/MgO/p-GaN double heterojunction was realized.

The zero-dimensional (C₂₄H₂₀P)₂MnBr₄ exhibits remarkable high-pressure-induced emission tuning that shifts from green to red and an irreversible bandgap narrowing of 1.09 eV.

A two-dimensional zinc-based MOF (ZHPCA) was synthesized and employed as the interface modification layer of Zn anode, and the N-functional groups in ZHPCA can be used as binding sites for zinc ion deposition.

A Zn coordination polymer was constructed to identify chiral cinchonine and cinchonidine with high sensitivity, selectivity, and reproducibility.

Our findings show that the spectral stability of the quasi-2D perovskite system is mainly affected by the uniformity of the Br–Cl distribution, rather than defects.

This graph shows a Mg₂Si/Si heterojunction photodetector fabricated with the assistance of nanostructures, enabling enhanced optoelectronic performance with a 173–402% improvement in responsivity and a 111–281% improvement in specific detectivity.

A novel WSIT based on TIEL and single-electrode TENG is developed with self-powered optical–electrical dual-mode sensing functionality, which may be widely applicable in fields like intelligent robots, augmented reality, and smart homes.

Mechanism schematic of the EM wave absorption and thermal conduction of composites.

The CSAS method can increase the density of the ceramics and reduce the volatilization of the A-site elements, thus changing the phase structure of the ceramics and making them high piezoelectric properties.

Heavy fermion characteristics and potential superconductivity are observed in the partially vacancy-ordered Y₄Fe_xGe₈.

Compared with traditional photocatalytic materials, hollow nanofibers can show greatly improved photocatalytic efficiency due to their large specific surface area and more surface-active sites.

A novel ZnO:NADH composite electron transport layer is constructed, and the efficiency of organic solar cells (OSCs) with PM6:L8-BO as the active layer has improved from 17.43% to 18.21%.

A strategy for in situ preparation of lead-free double perovskite-based polymer composite film with large area and high efficiency white light emission and its applications.

Strongly relaxed ferroelectric KNN-based ceramics with nano-domains are developed, and synergistic enhancement with a large W_rec and good transparency is realized.

A large size TBP₂MnBr₄ transparent ceramic is prepared by the melt processing method, which shows a high transmittance of >80% in the wavelength range of 350 nm to 800 nm, for realizing a high-resolution (16 lp mm⁻¹) X-ray imaging.

The work function of ZnO is reduced with H adsorbed on oxygen defects, leading to the hydrogen sensing effect.

An asymmetric Au/CsPbBr₃/SmB₆ self-powered photodetector exhibits greatly enhanced visible-light photosensitive performances with the help of an interfacial built-in field.

Efficient and easily repeatable organic solar cells were fabricated based on a highly mixed tolerant acceptor in a high boiling point solvent.

Self-activated zinc germanates show ternary persistent luminescence of blue, green, and near-infrared light, which are linked with native defects. Aliovalent Al³⁺-doped zinc germanates achieve new yellow emission and enhanced afterglow.

Superior triplet harvesting properties of TMCz-BO emitter are analyzed in liquid and solid media. The notions of dynamic and static excited-state mixing are introduced to explain dual and triple nature of S₁ and T₁ states as well as TADF mechanism.

The additive 1-phenylnaphthalene (PN) with large steric hindrance is used to promote J-aggregation of N3 molecules, which is conductive to broadening absorption spectra and improving charge transport for high-performance thick OSCs.

This work presents a micro-cavity cathode as a replacement for the traditional thick metal cathode in natural-color TPVs, improving both aesthetic integration and stability.

High-mobility n-type organic transistors that maintain performance for over 1000 minutes under bias stress pave the way for complementary organic circuits, overcoming a key obstacle in the field.

Vinyl-containing conjugated polymers exhibiting extended conjugated skeletons with long-wavelength absorption and high carrier mobility have been widely investigated as polymer semiconductors.

The ZnPc:C₆₀ OPD based on intermolecular charge transfer absorption can sense light up to the telecommunication band by incorporating an atomic-thick Al₂O₃ layer.

Skin-inspired laminated hydrogel infused with liquid metal, exhibiting exceptional mechanical toughness and superior electrical conductivity.

Enhanced NIR phosphorescence emission in the longer-wavelength region can be produced from a highly ordered host–guest aggregate structure arising from the same crystal packing pattern of the host and guest molecules with structural similarity.

A supramolecular fluorescent probe based on unique fluorescence of Eu-complex and precise recognition of pillar[5]arene is developed for two channel simultaneous detection of H₂O₂ and ATP in living cells.