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Ternary organic blends using two non-fullerene acceptors are shown to improve the efficiency and stability of low-cost solar cells based on P3HT and of high-performance photovoltaic devices based on low-bandgap donor polymers.
A generalized charge-transport model is reported that is able to describe the thermopower–conductivity relation at various temperatures in several semiconducting polymers, suggesting a rethinking of conduction mechanisms in these materials.
An improved ligand-exchange process allows the realization of solution-deposited films of quantum dots with reduced energetic disorder and, as a result, solar cells with improved open-circuit voltage, charge-carrier transport and stability.
Domain walls in ferroelectrics are known to be conductive, but details of the precise mechanism are elusive. Atomic-scale structural and chemical characterization of domain walls in BiFeO3 now reveals a build-up of charged defects.
The interaction of water with TiO2 is crucial for applications such as photocatalytic water splitting. The interfacial structure between water and rutile TiO2 is now shown to consist of an array of hydroxyl molecules with water in the second layer.
Silicon-based photoelectrodes are attractive for solar fuel production, but suffer from vulnerability to corrosion. Using dielectric breakdown, a generic approach to improve the performance of metal-oxide semiconductor photoelectrodes is proposed.
The use of monolayers of hexagonal boron nitride as the cationic diffusion barrier and graphene aerogel mixed with spiro-OMeTAD as the hole transport layer allows the fabrication of graded bandgap perovskite solar cells with high efficiency.
In photosynthesis the oxidation of water is a requirement for providing sufficient protons and electrons for fuel formation. A biphasic water splitting catalyst tailored for integration with high-performance semiconductor photoanodes is now reported.
A new model for collagen intrafibrillar mineralization shows the need for a balance between osmotic equilibrium and electroneutrality to establish Gibbs–Donnan equilibrium.
Mesenchymal stem cells primed on soft silicone substrates suppress fibrogenesis and are desensitized against subsequent mechanical activation in vitro and in vivo.
Plants can be engineered to serve as self-powered pre-concentrators and autosamplers of analytes in ambient groundwater and as infrared communication platforms that can send information to a smartphone.
Single cells encapsulated in a layer of alginate and injected intravenously delay clearance kinetics and sustain donor-derived soluble factors in vivo.
Heterostructures formed by the magnetic topological insulator Cr-doped (Bi,Sb)2Te and the antiferromagnet CrSb are shown to exhibit emergent interfacial magnetic phenomena that can be tuned with the heterostructure geometry.
Heart-on-a-chip devices with integrated strain gauges for direct readout of tissue contractile strength allow for multiplexed drug-dose experiments and studies of functional maturation of cardiac tissue.
The electronic properties of bulk solids composed of zwitterionic tetrathiafulvalene-extended dicarboxylate radicals are investigated, showing highly conducting metallic behaviour in single-component molecular systems having only s and p electrons.
A universal descriptor for the prediction of C–H bond activation barriers has been established, and combined with a thermodynamic analysis of methane activation, to provide design rules for various types of heterogeneous catalysts.
Using MOFs as active electrodes in electrochemical double layer capacitors has so far proved difficult. An electrically conductive MOF used as an electrode is now shown to exhibit electrochemical performance similar to most carbon-based materials.
A high-throughput hydrogel-based platelet-contraction cytometer is able to quantify single-platelet contraction forces and may function as a clinical diagnostic biophysical biomarker.
Understanding interactions between water and oxides is crucial for energy storage and photocatalysis. The combined effect of water and electron irradiation on perovskite catalysts results in structural oscillation triggered by gaseous bubbles.
Time-resolved photo-conductance and microwave conductance investigations reveal that methylammonium lead iodide perovskites have an indirect bandgap at temperatures relevant to photovoltaic applications.