Themed collection 2021 Journal of Materials Chemistry C most popular articles

We discuss the recent advances and main approaches towards the design of electrically conductive COFs, highlight some of the challenges in such design and give our views on the future directions of this field.

This Perspective discusses the developments, opportunities, and challenges in the context of the use of alkyne-based organic semiconductors in photovoltaic devices.

The presence of lead in perovskite solar cells represents for many a cause of concern. However, alternative elements for lead-free perovskites also present several concerns in terms of toxicity, cost and environmental impact so far neglected.

This review summarizes recent advances in developing high-efficiency upconversion nanoparticles and nanomaterials for photovoltaic application.

Monitoring CO₂ levels in the atmosphere as well as in work place environments is strictly regulated.

Diketopyrrolopyrroles stand out due to their chemical and optoelectronic properties. Diketopyrrolopyrrole-single molecules applied in organic, dye-sensitized and perovskite solar cells are presented to give clues for future molecular optimizations.

The progress on melanin's physical–chemical properties, synthesis, processing, and applications is discussed based on recent literature.

The paper reviews synthetic design and optoelectronic properties of π-conjugated molecules and polymers based on the acenaphthylene building block.

This review presents the multi-faceted applications of oligoynes in molecular electronics and optoelectronics, as well as recent insights for the design and properties of sp-hybridised carbon wires.

This review summarises high performing n-type polymers for use in organic thin film transistors, organic electrochemical transistors and organic thermoelectric devices with a focus on stability issues arising in these electron transporting materials.

Two wide-bandgap copolymer donors with reduced synthesis cost offered decent PCEs up to 15.25% in organic solar cells.

A quaternary IR-NLO thioantimonate, K₂Ag₃Sb₃S₇, designed using an aliovalent-cation-substitution-induced (ACSI) strategy based on the centrosymmetric K₂Sb₄S₇ is reported.

All-polymer photomultiplication type photodetectors were built based on PMBBDT:N2200 (100 : 3, w/w) as photoactive layers, which can be applied in optical switch systems without any current pre-amplifier.

Efficient blue thermally activated delayed fluorescent emitters based on organic boron-acceptor are developed with high external quantum efficiencies and finely tuned CIE coordinates.

Up to 5 μm large ca. 5 nm thick PbSe, HgSe, SnCuSe, ZnCuSe, and Cu–Zn–Sn–Se nanosheets (NSs) were synthesized via cation exchange starting from CuSe NSs, offering a universal platform for the synthesis of other metal selenide 2D nanomaterials.

Here, we explore the potential of subphthalocyanines (SubPcs) as ETMs in PSCs, where the perovskite is deposited by either solution processing or thermal evaporation. A maximum PCE of 10.8% was achieved with the champion device.

The synergistic use of X-ray scattering and molecular dynamics simulations reveals the structure–property relationships of [60]fullerene derivatives with oligoethylene–glycol side chains.

Polyoxometalate-bis-pyrene receptors for phenyl-C61-butyric acid methyl ester (PCBM) provide an interfacial layer (IFL) material enhancing the open circuit voltage of the organic photovoltaic device of about 34% under applied bias of ±5 V.

We report on the synthesis and single-molecule conductance of a para-oligo(phenylene)ethynylene derivative with a non-symmetric positioned internal anchor group that gives rise to three conduction pathways of well distinctive conductance and length.

A new aromatic ladder polymer with a polyacene skeleton shows an unexpectedly high flexibility of its double-stranded backbone.

Two thiophene-based macrocycles have been synthesised and their optoelectronics applications have been investigated.

A new non-fullerene small molecule (MPU6) containing thienylethynylselenophene bridges, has been studied as an acceptor along with PC₇₁BM and TDTBTA as a donor in ternary solution-processed bulk heterojunction polymer solar cells, showing a PCE of 15.60%.

Twofold effect of molecular functionalization of defective transition metal dichalcogenides (TMDCs).

The effects of alkyl side units in double-cable conjugated polymers on the photovoltaic performance of single-component organic solar cells were systematically studied.

Two pairs of constitutional isomeric TADF dopants (35CzBPym and 25CzBPym; 35tCzBPym and 25tCzBPym) containing benzoyl pyrimidine (BPym) as an acceptor and carbazoles (Czs) as donors were designed for high-efficiency OLEDs.

High quality (−201) orientated β-Ga₂O_{3 thin films are obtained on four-fold symmetric cubic phase CeO2 (001)} substrates and are fabricated into photodetectors with excellent photoelectrical performance.

Anthracene-based non-doped OLED devices show EQE = 7.2% due to the delayed fluorescence resulting from the triplet-triplet annihilation (TTA). The hyperfluorescence device, in combination with a TADF assistant dopant, provides a high EQE of 17.8%.

A tuneable laser-induced oxidation technique was demonstrated for the fabrication of binder-free and robust electroactive copper oxide film as a highly sensitive non-enzymatic glucose sensor.

The lateral CC-π-extension of perylene diimides (PDIs) to coronene diimides (CDIs) leads to undesired effects such as the decrease of the absorption and a hypsochromic shift. This could be overcome by lateral BN-annulation of PDIs to form superior BNCDIs.

Five emitters with the tris(triazolo)triazine acceptor core are reported, with emission from deep blue to green. These emitters show promising thermally activated delayed fluorescence and/or two-photon fluorescence properties.

Boron/nitrogen substituted polyaromatic hydrocarbons (PAHs) are unique materials, with similar molecular structures to their carbon/carbon analogs, but different electronic properties.

Donor–acceptor–donor molecules containing heavy chalcogen atoms, which feature multi-color polymorphism, external-stimuli responsive luminochromism, thermally-activated delayed fluorescence, and room-temperature phosphorescence, have been developed.

In order to solve the shortcomings of the complex manufacturing process and high cost of flexible pressure sensors, a low-cost and eco-friendly flexible pressure sensor is achieved using a simple do-it-yourself (DIY) approach.

Salt-percolated hydrogels show excellent anti-freezing and anti-drying abilities, high conductivity at ultralow temperatures (−78.5 °C), and excellent thermal and strain sensing performance, which can monitor various physiological signals.

Conductive hydrogels are promising material candidates in artificial skin and muscles, flexible and implantable bioelectronics, and tissue engineering.

The role of fullerenes as interfacial electron extractors and as bulk electron transporters in PSCs was differentially assessed in order to optimize device performances.

Trap states in perovskite thin films were passivated effectively by pentafluoroaniline (PFA) additive, thereby significantly enhancing the photovoltaic performances as well as the overall device stability.

Greatly enhanced dielectric charge storage capabilities are achieved in composites via introducing ultra-thin FePO₄ nanosheets and designing bilayer structures.

High-performance OPVs with relatively thick active layers are essential for large-scale production. A PCE of 15.63% is achieved by the optimized ternary OPVs with 300 nm thick active layers by combining the superiorities of two binary thick-film OPVs.

Regioregular yet near-amorphous indacenodithiophene-based polymers exhibit superior deformability as well as high mobility values up to 1.67 cm² V⁻¹ s⁻¹.

A series of multi-resonance ultra-pure-green TADF emitters based on bridged diarylamine derivatives is successfully developed for high efficiency and narrow emission OLEDs which exhibit a high EQE over 20% and narrow FWHM of less than 50 nm.

Increase in the spontaneous magnetization up to x < 0.5 is a sequence of appearance of the additional magnetic moment of 2 μ_B of the Ni²⁺ cations in tetrahedral positions. For x > 0.5, the moment decreases in octahedral positions and the spontaneous magnetization also decreases.

We report a series of Cr³⁺-doped olivine phosphors with tunable luminescence from 940 to 1100 nm. They have promising applications in the field of food processing for both qualitative identification and quantitative analysis.

Cu₂O/MoS₂ hybrids are used for the low-operating temperature detection of NH₃. A sensing response of 872% is achieved for the M-5 sensor, displaying an improvement compared with bare Cu₂O (103%). The selectivity is also increased for M-5 sensor.

Charge-transfer based molecular conductors have attracted great attention in recent years, but have been rarely explored in the field of electromagnetic materials.

An opto-electronic switching device made from an evaporated spin crossover thin film over a graphene sensor is presented. The electrical transduction of both temperature and light-induced reversible spin transitions are demonstrated.

Mechanically strong and thermostable composites are prepared for thermal management based on soft liquid metal and rigid aramid nanofibers.

In this work, Janus monolayers are predicted for a new 2D MA₂Z₄ family by means of first-principles calculations. The predicted MSiGeN₄ (M = Mo and W) monolayers exhibit dynamic, thermodynamic and mechanical stability, and they are indirect band-gap semiconductors.

A novel Eu_0.07Gd_0.03-MOF with high water stability, which can serve as ratiometric fluorescence sensor for “color-change-recover” detection of Fe³⁺ and ascorbic acid in an aqueous environment.

GdAl₃(BO₃)₄:Cr³⁺ is used to fabricate a NIR-pc-LED that shows promise for plant lighting and applications in the nondestructive analysis of agricultural products.