Towards organic neuromorphic devices for adaptive sensing and novel computing paradigms in bioelectronics
We present an overview of the latest studies on organic neuromorphic and smart sensing devices and highlight the potential of these concepts to enhance the interaction efficiency between electronics and biological substances.
n-Type organic electrochemical transistors: materials and challenges
The rise of n-type organic electrochemical transistors (OECTs): from materials to applications.
2,3-Thienoimide-ended oligothiophenes as ambipolar semiconductors for multifunctional single-layer light-emitting transistors
In view of developing multifunctional OLETs, 2,3-thienoimide-ended oligothiophenes are proposed as ideal candidates to effectively ensure good ambipolar field-effect mobility, self-assembly capability and high luminescence in solid state.
Layer-by-layer fabrication of organic photovoltaic devices: material selection and processing conditions
Layer-by-layer (LbL) processing, otherwise known as sequential deposition, is emerging as the most promising strategy for fabrication of active layers in organic photovoltaic (OPV) devices on both laboratory and industrial scales.
CsPbI3 nanocrystal films: towards higher stability and efficiency
A review on strategies to improve stability, optical properties and device efficiency of red-perovskite nanocrystal layers.
Structure-induced optoelectronic properties of phenothiazine-based materials
Phenothiazine (PTZ)-based materials have recently received considerable interest owing to their intriguing optoelectronic properties, low-cost, versatility of functionalization, and commercial availability.
Thermal properties of metal-halide perovskites
The thermal properties of metal-halide perovskites are reviewed with respect to experimental findings, theoretical insights, dimensionalities, and phase transitions.
Ga2O3 polymorphs: tailoring the epitaxial growth conditions
We review the nucleation and growth of different Ga2O3 polymorphs with several techniques, giving practical guidelines for their synthesis.
Two-dimensional conjugated polymer films via liquid-interface-assisted synthesis toward organic electronic devices
Development of conjugated polymers in two dimensions via liquid-interface-assisted synthesis as active layers for use in electronic devices.
Photoelectron spectroscopy on single crystals of organic semiconductors: experimental electronic band structure for optoelectronic properties
Methodologies and experimental achievements for exploration into electronic band structures of organic semiconductor and hybrid perovskite single crystals are reviewed.
Lanthanide-based inorganic–organic hybrid materials for photon-upconversion
Photon-upconversion materials are capable of converting low energy infrared light into higher energy visible or ultraviolet light.
Metal particle-free inks for printed flexible electronics
The development of metal particle-free inks is reviewed, with particular attention on their formulation, patterning and post-processing techniques.
Hot carrier solar cells and the potential of perovskites for breaking the Shockley–Queisser limit
We review the cooling of charge carriers in metal halide perovskites for the use in hot carrier solar cells.
The researcher's guide to solid-state dye-sensitized solar cells
Solid-state dye-sensitized solar cell components, materials, architectures and interfaces are comprehensively reviewed.
Supramolecular design principles for efficient photoresponsive polymer–azobenzene complexes
Recent progress in photoresponsive polymers based on three common supramolecular design strategies, namely ionic, hydrogen and halogen bonding, is reviewed.
2D material liquid crystals for optoelectronics and photonics
The merging of the materials science paradigms of liquid crystals and 2D materials promises superb new opportunities for the advancement of the fields of optoelectronics and photonics. In this review, we summarise the development and applications of 2D material liquid crystals for optoelectronics and photonics.
Perspective on carbazole-based organic compounds as emitters and hosts in TADF applications
Perspective covering carbazole-containing emitters and hosts for third generation TADF (thermally-activated delayed fluorescence) OLED technology along with computational benchmark studies.
Process–property relationship in high-k ALD SrTiO3 and BaTiO3: a review
This review addresses recent approaches for atomic layer deposition (ALD) that are closely related to the electrical properties of ultrathin SrTiO3 and BaTiO3 films.
Pixelated full-colour small molecule semiconductor devices towards artificial retinas
Variable bandgap conjugated donor–acceptor small molecule thin films show absorption spectra similar to those of human eye's photoreceptors. Photoactive devices interfaced with a bio-electrolyte reveal capacitive photocurrent response making them suitable for future full-colour retinal prosthesis.
Influencing prototropy by metal ion coordination: supramolecular transformation of a dynamer into a Zn-based toroidal species
The work provides a previously unknown example of the desymmetrisation of an organic component resulting from the metal-ion induced tautomerisation which led to the generation of a new type of toroidal coordination species at a solid–liquid interface.
Electronic properties of phases in the quasi-binary Bi2Se3–Bi2S3 system
We investigated the quasi-binary Bi2Se3–Bi2S3 system and experimentally demonstrated the compositional range of existence of the topological surface states.
Mechanisms for collective inversion-symmetry breaking in dabconium perovskite ferroelectrics
We show that the combination of molecular shape and strain coupling drives the emergence of polarisation in methyldabconium perovskite ferroelectrics.
Anisotropic silica colloids for light scattering
Anisotropic silica particles were used as model scattering enhancers and directly compared to their spherical counterparts. Furthermore, silica rods were assembled into micron-sized scattering particles. This allows for use in pigment formulations.
Engineering Sr-doping for enabling long-term stable FAPb1−xSrxI3 quantum dots with 100% photoluminescence quantum yield
The Pb substitution in quantum dots (PQDs) with lesser toxic metals has been widely searched to be environmentally friendly, and be of comparable or improved performance compared to the lead-perovskite.
Enhanced 1.54 μm luminescence of a perfluorinated erbium complex sensitized by perfluorinated Pt(II) and Zn(II) phthalocyanines with 980 nm emission
Metallophthalocyanines with ∼980 nm emission show sensitization effects on an erbium complex. A long lifetime of 1.05 ms, a PLQY of 13%, Er3+ 1.5 μm emission enhancement of 81 times are obtained in the perfluorinated organic erbium co-doped system.
Biodegradable inkjet-printed electrochromic display for sustainable short-lifecycle electronics
We report on inkjet-printed, wearable electrochromic displays with certified biodegradability according to the international standard 14855 for short-lifecycle applications.
Two-dimensional monoelemental germanene nanosheets: facile preparation and optoelectronic applications
Few-layer 2D germanium nanosheets (GeNS) are obtained via a facile liquid-phase exfoliated method and fabricated as electrode materials to assemble self-powered high performance photo-electrochemical (PEC) type photodetectors.
Efficient third harmonic generation from FAPbBr3 perovskite nanocrystals
Experimental evidence and characterization of nonlinear third harmonic generation from hybrid FAPbBr3 perovskite nanocrystals embedded in a porous thin film demonstrate a new potential application of these semiconductors.
Synthesis of small Ag–Sb–Te nanocrystals with composition control
Ternary telluride nanocrystals have gained increasing interest as materials for thermoelectric, optoelectronic, and phase-change memory applications. This paper presents an amide-promoted synthesis for Ag–Sb–Te colloidal nanocrystals with accurate composition control.
Charge-transfer engineering strategies for tailored ionic conductivity at oxide interfaces
Based on the example of the p-type LaAlO3/SrTiO3 interface, we discuss charge-transfer phenomena that tailor the ionic conductivity along oxide heterointerfaces, by providing a confined space-charge layer as channel for oxygen ion conduction.
A bifacial colour-tunable system via combination of a cholesteric liquid crystal network and hydrogel
We present a colour tunable system obtained by combining a humidity-responsive cholesteric liquid crystal network and hydrogel coatings, in a diligently designed cell-geometry.
Prolonged and efficient near-infrared photoluminescence of a sensitized organic ytterbium-containing molecular composite
A novel approach to sharp and persist NIR luminescence at 1 μm wavelength.
Utilizing Diels–Alder “click” chemistry to functionalize the organic–organic interface of semiconducting polymers
An all-solution-based modular functionalization of a cross-linked polymer semiconductor interface is presented. The thus covalently introduced moieties can be utilised for tailor-made organic–organic interfaces in organic optoelectronic devices.
Stable antiferromagnetic nanocrystals for room temperature applications: the case of iron nitride
We characterise the magnetism of self-assembled FenN nanocrystals, combining core level spectroscopy with first-principles theory. Ferromagnetic and antiferromagnetic phases are found, which are magnetically ordered at room temperature.
Complete self-recovery of photoluminescence of photodegraded cesium lead bromide quantum dots
Self-readsorption of surface ligands completely restores the photoluminescence of CsPbBr3 quantum dots damaged by excitation light.
Compositionally tunable ternary Bi2(Se1−xTex)3 and (Bi1−ySby)2Te3 thin films via low pressure chemical vapour deposition
[MCl3(EnBu2)3] (M = Sb, Bi; E = Se, Te) enable CVD growth of ternary Bi2(Se1−xTex)3 and (Bi1−ySby)2Te3 thin films with good compositional, structural and morphological control.
Highly stable doping of a polar polythiophene through co-processing with sulfonic acids and bistriflimide
Upon doping with sulfonic acids and bistriflimide the polar polythiophene p(g42T-T) exhibits a maximum conductivity of 120 S cm−1 and can be hot-pressed into self-standing, flexible films.
Synthesis, crystal structure, magnetic and electronic properties of the caesium-based transition metal halide Cs3Fe2Br9
A 0D perovskite-related material Cs3Fe2Br9 is shown to have a low bandgap of 1.65 eV and exhibit antiferromagnetic behaviour.
From anthraquinone to heterocoronene as stable red chromophore
A new heterocoronene-based chromophore was synthesized via a two-step reaction and showed similar photostability to perylenetetracaboxdiimides.
Polymer colour converter with very high modulation bandwidth for visible light communications
We report the synthesis, photophysics and application of a novel semiconducting polymer as a colour converter for high speed visible light communication.
Electronic structure design for nanoporous, electrically conductive zeolitic imidazolate frameworks
Electronic structure calculations are used to develop design rules for enhanced electrical conductivity in zeolitic imidazolate frameworks.
Influence of nanoscale order–disorder transitions on the magnetic properties of Heusler compounds for spintronics
Modifications in nanoscale chemical order can tune the magnetic properties of Co2FeSixAl1−x, indicating disorder as a potential engineering tool.
Rapid laser-induced photochemical conversion of sol–gel precursors to In2O3 layers and their application in thin-film transistors
We report the development of indium oxide (In2O3) transistors via a single step laser-induced photochemical conversion process of a sol–gel metal oxide precursor.
A novel angularly fused bistetracene: facile synthesis, crystal packing and single-crystal field effect transistors
Simply “migrating” the aromatic sextet of cata-condensed 2D PAH with the same number of fused benzene rings affords novel organic semiconductors with different properties.
Temperature-insensitive electro-optic response of polymer-stabilized blue phases
Polymer-stabilized blue phase liquid crystal in-plane switching cell.
Liquid-crystalline TADF materials based on substituted carbazoles and terephthalonitrile
Functionalising 2,5-di(N,N'-carbazolyl)terephthalonitrile or 2,3,5,6-tetra(N,N'-carbazolyl)terephthalonitrile on the carbazole moiety with alkoxy chains, gives a family of materials that show TADF response; two of them are also liquid crystalline.
DFT and experimental studies of iron oxide-based nanocomposites for efficient electrocatalysis
Encapsulated iron oxide nanoparticles with g-C3N4 shells (Fex-NC) promote the hydrogen evolution reaction. The interactions between Fex-NC nanocomposites were investigated by DFT.
Route to tunable room temperature electric polarization in SrTiO3–CoFe2O4 heterostructures
We show reversible room temperature control of the Ti band structure in SrTiO3–CoFe2O4 heterostructures exploiting CoFe2O4 magnetostriction. Changes as a function of the applied magnetic field suggest the development of a net electric polarization.
Long-range ordering of two-dimensional wide bandgap tantalum oxide nanosheets in printed films
The exfoliation mechanism of high charge density 2D tantalum oxide nanosheets was optimized. Single monolayers and thicker thin films were realized and the bandgap of single nanosheets was measured electrically.
Ag2ZnSnS4–ZnS core–shell colloidal quantum dots: a near-infrared luminescent material based on environmentally friendly elements
Passivation and optimization of luminescent AZTS QDs with ZnS shells gave rise to a ∼30-fold increase in the PLQY results in RoHS compliant low-cost, bright and tunable NIR-luminescent phosphors for bio-imaging and LED applications.
Transformation of Co3O4 nanoparticles to CoO monitored by in situ TEM and predicted ferromagnetism at the Co3O4/CoO interface from first principles
The heating-induced transformation of Co3O4 nanoparticles to CoO at 350–400 °C was monitored in nanoscale detail by in situ TEM; DFT calculations predict a considerable net ferromagnetic moment originating from the Co3O4/CoO interface.
Ligand-assisted solid phase synthesis of mixed-halide perovskite nanocrystals for color-pure and efficient electroluminescence
We have developed a new post-synthetic approach, ligand-assisted solid phase synthesis (LASPS), to tune the optical properties of colloidal methylammonium lead halide perovskite nanocrystals with color-pure electroluminescence.
Multianvil high-pressure/high-temperature synthesis and characterization of magnetoelectric HP-Co3TeO6
By high-pressure/high-temperature multianvil synthesis a new high-pressure (HP) phase of Co3TeO6 was obtained.
Remarkable smectic phase behaviour in odd-membered liquid crystal dimers: the CT6O.m series
A new series of liquid crystal dimers exhibits rich smectic behaviour, including a modulated phase made of tilted SmC layer fragments, the strong biaxiality of which results in an unusual switching mode on application of an electric field.
Revisiting the structural, electronic and photocatalytic properties of Ti and Zr based perovskites with meta-GGA functionals of DFT
Combining the SCAN and mBJ-LDA meta-GGA functionals of DFT facilitates accurate and efficient computation of physical properties of photocatalysts which is either comparable or better than computationally expansive hybrid functionals or GW methods.
Pyrolyzed chitin nanofiber paper as a three-dimensional porous and defective nanocarbon for photosensing and energy storage
Three-dimensional porous and defect-rich nitrogen-doped nanocarbon is successfully prepared by facile pyrolysis of crab shell-derived chitin nanofiber paper, delivering promising performance in both photosensing and energy storage.
A roadmap for laser optimization of Yb:Ca3(NbGa)5O12-CNGG-type single crystal garnets
Lasing-relevant processing and physical properties of Yb-doped Ca3(NbGa)5O12-CNGG-type disordered garnet crystals are discussed. Future directions for Yb3+ bandwidth and laser performance improvements are foreseen.
Electrohydrodynamic jet printed conducting polymer for enhanced chemiresistive gas sensors
EHD printing of discrete conducting polymer arrays, bridging the electrodes for highly sensitive chemiresistive gas sensors.
High performance, electroforming-free, thin film memristors using ionic Na0.5Bi0.5TiO3
Interfacial resistive switching and composition-tunable RLRS are realized in ionically conducting Na0.5Bi0.5TiO3 thin films, allowing optimised ON/OFF ratio (>104) to be achieved with low growth temperature (600 °C) and low thickness (<20 nm).
Persistent luminescence of transparent ZnGa2O4:Cr3+ thin films from colloidal nanoparticles of tunable size
We report on the fabrication of transparent thin films from colloidal suspensions of ZnGa2O4:Cr3+ nanoparticles and the evaluation, for the first time in the literature, of their persistent red to NIR emission.
N-Doping improves charge transport and morphology in the organic non-fullerene acceptor O-IDTBR
Charge transport in organic non-fullerene acceptor n-type organic transistors is improved by synergistic doping effects and morphological changes.
Elucidating the growth mechanism of ZnO films by atomic layer deposition with oxygen gas via isotopic tracking
The growth process of zinc oxide (ZnO) thin films by atomic layer deposition (ALD) accompanied by the presence of oxygen gas pulsing is investigated by means of the isotopic tracking of oxygen 18O from the water precursor and oxygen 16O from the gas.
Improved performance of perovskite light-emitting diodes with a NaCl doped PEDOT:PSS hole transport layer
The effect of the NaCl doping and its implementation in perovskite light-emitting diodes were studied for the first time.
Elimination of interlayer Schottky barrier in borophene/C4N4 vdW heterojunctions via Li-ion adsorption for tunneling photodiodes
The adsorption of Li-ions on the bottom site contributes to improve the photodetectivity and photoresponsivity in B/C4N4 vdW heterojunction photodiode, owing to the elimination of interlayer Schottky barrier.
Tyrian purple: an ancient natural dye for cross-conjugated n-type charge transport
N-type charge transport from cross-conjugated polymers derived from an ancient dye.
Inverted organic photovoltaics with a solution-processed ZnO/MgO electron transport bilayer
Applying ultrathin MgO as the top component of a ZnO/MgO electron transport layer enhances the performance of organic photovoltaics.
Critical effect of the bottom electrode on the ferroelectricity of epitaxial Hf0.5Zr0.5O2 thin films
Comparison of a set of perovskite electrodes shows that La1−x(Ca,Sr)xMnO3 is critical to stabilize the ferroelectric orthorhombic phase in epitaxial films. The stabilization is favored if the La content in the manganite is high.
Thermal conductivity reduction by nanostructuration in electrodeposited CuNi alloys
The thermal conductivity of CuNi alloys grown by pulsed electrodeposition is reduced by the nanostructuration to a value of 9.0 ± 0.9 W m−1 K−1 due to the incorporation of saccharine in the electrolyte which allowed reduction of the crystallite size.
An up-conversion luminophore with high quantum yield and brightness based on BaF2:Yb3+,Er3+ single crystals
Optical properties of BaF2 single crystals doped with Yb3+ and Er ions are studied. The highest ϕUC value of 10.0% was demonstrated for the BaF2:Er3+ (2 mol%) /Yb3+ (3 mol%) sample under 490 W cm−2 of 976 nm excitation.
Single crystal of two-dimensional mixed-halide copper-based perovskites with reversible thermochromism
Facile synthesis of single crystal of two-dimensional mixed-halide copper-based perovskites with tunable band gaps and their capability of exfoliation and reversible thermochromism.
About this collection
This collection contains recent Open Access articles published by Journal of Materials Chemistry C, the home for high impact applications, properties and synthesis of exciting new materials for optical, magnetic and electronic devices. New articles will be added to this webpage as soon as possible after publication.