Themed collection Journal of Materials Chemistry C Lunar New Year collection 2021

This work systematically summarizes recent advances in circularly polarized luminescence (CPL) based on aggregation-induced emission luminogens (AIEgens).

Electroluminescence light-emitting diodes enabled by hybridising colloidal quantum dots is an emerging technology for large-area and foldable ambient lighting. We summerise state-of-the-art scientific challenges and prospect their future development.

Electrides are systems in which an electron is not bound to an atom and plays an active role in the structure. The three types of electron confinement have been confirmed.

A review of the recent developments of digital manufacturing methods of functional materials for wearable electronics applications.

MOF-based substrates and their SERS applications.

This review summarizes recent advances in blue OLEDs based on fluorescence emitters, especially focusing on the different mechanisms involving the emitters and devices.

Black phosphorus analogues with excellent performance and high chemical stability hold great promise for practical applications.

This article outlines the latest advances of copper nanowires in electronic applications, including flexible transparent electrodes for optical devices, current collectors for lithium-ion batteries, and stretchable electrodes for wearable devices.

Recent advances in photoswitchable molecular devices based on single molecules or self-assembled monolayers of photochromic molecules are summarized and discussed.

The technological evolution has been progressing for centuries and will possibly increase at a higher rate in the 21st century.

OLED devices based on linear rod-like TADF emitters exhibited high device efficiencies of 29.9% and 25.8% by means of high horizontal emitting dipole orientation and controlled dual emission.

A one-dimensional bismuth-based perovskite derivative (DMEDA)BiI₅ was investigated for X-ray photoelectric detection.

A series of ternary OSCs were fabricated with PBDB-T-2Cl:IXIC-4Cl as a host system and IT-4F as the third component. The optimal ternary device achieved an excellent PCE of 15.0%.

Porous carbon-based composites have attracted extensive attention because of their good performance.

Methoxyl group was introduced to obtain isomer-free methoxylation quinoidal bithiophene building block. Four polymers displayed narrow bandgap (<1.20 eV) and hole mobility of up to 2.70 cm² V⁻¹ s⁻¹.

Four fused-ring electron acceptors composed of the same core and end groups without or with hexyloxyl groups on the core and/or phenyl side chains are compared to systematically study the effects of alkoxylation position on the molecular packing, optical, electronic, and photovoltaic properties of the nonfullerene acceptors.

Effects of the chalcogen atoms in [1]benzochalcogenopheno[3,2-b][1]benzochalcogenophenes (BXBXs), the key π-conjugated core structures in the development of superior organic semiconductors, are investigated.

Multi-carbazole TADF molecules with an ortho-biphenyl local triplet scaffold exhibiting an EQE of 23.7% and a LT50 of 750 hours.

Gradient PNIPAM-based intelligent hydrogels with bidirectional bending properties can realize flexibly controllable deformation and activity as soft actuators.

In this work, thermochromic luminescent materials with three emission states and controllable thermochromic transition temperatures were developed for multilevel anti-counterfeiting and high-security level information storage.

In this paper we report the extremely crystalline structures, high thermal stabilities, and strong fluorescence emissions of covalent organic frameworks based on linked carbazole units.

Designing near-infrared (NIR) absorbing donor–acceptor (D–A) polymers with photoresponse beyond 900 nm has remained a challenge in the area of organic photovoltaics (OPV) owing to the limited kinds of strong electron acceptors.

We demonstrate a novel multifunctional E-textile which functions as a pressure sensor, Joule heater, thermal insulator, and PM2.5 filter.

D–A–D′ AIEgens exhibit dual emission involving a blue TADF (monomer) and an orange TADF/RTP (dimer), which are switchable via aggregation-state engineering, and demonstrate high contrast MCL as well as white EL emission with high CRI.

A smart high-triplet energy hole-transporter exhibits significant stability in the anion state realizing record-breaking highly efficient and long-living thermally activated delayed fluorescent (TADF) organic light-emitting devices (OLEDs).

The effects of the composition on the stretchability and conductivity of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) polymer blends with soft polymers poly(acrylic acid) (PAA) and their application in pressure sensors.

First principles calculations are performed to predict phonon-limited carrier mobility for a novel graphene-like semiconductor with BC₆N stoichiometry.

Compared with the relaxor with pinched P–E loops, the relaxor/antiferroelectric (RE/AFE) composites have narrower and oblique curves, proving the design of RE/AFE is an effective method to improve the energy storage properties of dielectric ceramics.

We demonstrate silver (Ag) nanoparticle decorated polyaniline (PANI) and reduced graphene oxide (rGO) as Ag–PANI/rGO nanocomposites to realize non-enzymatic glucose sensors.

Emitting wavelength of cesium copper halides can be effectively tuned by regulating the process of mechanochemical reaction firstly.

Cyan-emitting Ca₂YHf₂Al₃O₁₂:xCe³⁺ garnet phosphors with a high photoluminescence quantum efficiency of up to 89.5% were developed for fabricating high color rendering warm-white LEDs.

The LTMN_0.25 + 1 wt% 0.6CuO–0.4B₂O₃ ceramic with low sintering temperature, small density and excellent performance have wide application prospects in 5G devices.

Five N-borylated TADF emitters bearing both boron dimesityl acceptor and methoxy substituted carbazole are presented with electroluminescence ranging from 444 to 468 nm, and with the best maximum external quantum efficiency of 13.3%.

Novel near-UV-excitable Ca₂YHf₂Al₃O₁₂:Ce³⁺,Tb³⁺ green phosphors with a highest internal quantum efficiency of 86.6% and external quantum efficiency of 63.1% were reported for high-CRI warm-white LEDs.

Thermal conductivities of polymer composites are enhanced by several orders of magnitude via conductive network conversion from high to low thermal dissipation.

ZnO/Ag/Ag₂O accelerates phenol degradation through different intermediate processes under white light illumination.

Solvent additives play an important role in optimizing the morphology of the photoactive layer and improving the photovoltaic performance of polymer solar cells (PSCs).

Optimized method for synthesis of CsPbI₃ NCs using dodecyldimethylammonium bromide as capping molecules can achieve enhanced stability.

Mechanical response, dynamical/thermal stability, electronic/optical properties and photocatalytic features of monoclinic As₂X₃ (X = S, Se and Te) nanosheets are explored via DFT simulations. As₂Te₃ lattice predicted by this study is found to exhibit superior superstretchability, outperforming other known 2D materials.

Two new blue TADF emitters, 3CzTB and M3CzB, for application in highly efficient organic light-emitting diodes are reported.

Novel (Na_0.5Bi_0.5)_0.7Sr_0.3TiO₃-based lead-free ceramics with vastly improved energy-storage properties for high power system applications.

In this study, three bipolar host materials (i.e.Py2Cz, Py2BFCz, and Py2ICz) for solution-processable green-emitting TADF-OLEDs were synthesized by coupling 2,4-diphenylpyrimidine to mCP and modifying the carbazole-donating units in the mCP structure.

2D hierarchically laminated Fe₃O₄@NPC@rGO nanocomposites exhibited excellent electromagnetic absorption owing to their micro-scale 3D magnetic coupling network, hierarchical dielectric carbon network and superior impedance matching.

An appropriately combined triple interface modification, i.e., post-annealing, O₂-plasma, and KCl treatments, is employed to ameliorate the optoelectronic properties of sputtered NiO_x films and achieve better device performance.

MXene nanocomposites exhibit self-healing capability, self-adhesive performance and long-lasting moisture, and can be assembled as epidermal sensors to wirelessly detect human motion.

In this work, we investigate VSe₂ for generating femtosecond and large energy mode-locked laser pulses for the first time.

Nonconventional luminescent copolymers poly(itaconic anhydride-co-vinyl caprolactam) (PIVC) and poly(itaconic anhydride-co-vinyl pyrrolidone) (PIVP) emit strong orange-red and bright white emissions, respectively.

Broadband cyan-emitting Ca₂LuZr₂(AlO₄)₃:Ce³⁺ garnet phosphors enabled to fill the cyan gap in the emission spectra of near-ultraviolet-pumped warm-white LEDs, thus resulting in improved color rendering index.

The 0.65(NBT-BKT)–0.35SBT ceramic possesses an ultra-high recoverable energy storage density (W_rec ∼ 4.06 J cm⁻³) and maintains a relatively high efficiency (η = ∼87.3%).

In current work, multiwalled carbon nanotubes (MWCNTs), graphene nanoplatelets (GnPs) and nickel (Ni chains or flowers) were evenly dispersed in poly(vinylidene fluoride) (PVDF) matrices to fabricate composite flexible films.