Light-emitting electrochemical cells (LEECs) offer the potential for high efficiency operation from an inexpensive device. However, long turn-on times and low luminance under steady-state are longstanding LEEC issues. Here, we present a single-layer with custom-designed iridium(III) complex lithium salt additive enhanced device performance. These devices display reduced response times, modest lifetimes, peak luminances as 5500 cd/m2, 80% higher than comparable unoptimized 50% salt-free...

A series of cationic iridium complexes with bulky, hydrophobic phenyl substituents, doped LiPF₆, in single-layer light-emitting electrochemical cells display reduced response times, modest lifetimes, and high luminances.

Light-emitting electrochemical cells (LEECs) utilizing small molecule emitters such as iridium complexes have great potential low-cost emissive devices. In these devices, ions rearrange during operation to facilitate carrier injection, bringing about efficient from simple, single layer Recent work has shown that the luminance, efficiency, and responsiveness of iridium-based LEECs are greatly enhanced by inclusion amounts lithium salts (≤0.5%/wt) into active layer. However, origin this...

Light-emitting electrochemical cells (LEECs) from small molecules, such as iridium complexes, have great potential low-cost emissive devices. In these devices, ions rearrange during operation to facilitate carrier injection, bringing about efficient simple, single-layer Prior work has shown that the luminance, efficiency, and responsiveness of LEECs is greatly enhanced by inclusion fractions lithium salts, but much remains be understood origin this enhancement. Recent with planar devices...

Abstract Hybrid perovskites are emerging as highly efficient materials for optoelectronic applications, however, their operational lifetime has remained a limiting factor continued progress. In this work, perovskite light emitting electrochemical cells utilizing an optimized fraction of lithium hexafluorophosphate (LiPF 6 ) salt additive exhibit enhanced stability. At 0.5 wt% LiPF , devices 100 h operation at high brightness in excess 800 cd m −2 under constant current driving, achieving...

Abstract The electrical and optoelectronic properties of nanometer-sized ZnO structures are highly influenced by its native point defects. Understanding controlling these defects essential for the development high-performance ZnO-based devices. Here, an device consisting a polycrystalline ZnO-coated silica nanospring was fabricated used to characterize photoconductive layer using near-UV (405 nm) sub-bandgap (532 633 excitation sources. We observe photocurrent response with all three...

Abstract The mechanical elasticity of lipid nanoparticles (LNPs) is crucial to their pharmaceutical performance. This study investigates how the interactions between LNPs, target cells, and macrophages affect internalization LNPs into cells at tumor sites. According our bio‐mechanical study, drug‐resistant breast cancer are stiffer than sensitive ones, while invasive softer; similarly, protumoral M2 softer M1 macrophages. Softer show increased cellular uptake in macrophages, with enhanced...

Light-emitting electrochemical cells (LEECs) are a promising low-cost option for display and solid-state lighting. In these devices, the interplay of mobile ions, electrons, holes makes rich physics that can be leveraged high performance. One example this is in formation radiative decay excitons-bound electron hole pairs. Considerations from exciton binding Langevin recombination suggest low dielectric constant (ϵ) would enhance emission. However, emission also enhanced by product bulk...

We report the synthesis, electrochemistry, photophysical properties and electroluminescence of a highly luminescent pyrazolate-bridged platinum(ii) complex. The complex has general formula [((N^C^N)Pt)2(μ-pz)][PF6] where N^C^N = 1,3-di(2-pyridyl)benzene μ-pz 3,5-diphenylpyrazolate. X-ray structure shows that bridging pyrazolate ligand causes close Pt-Pt interaction 3.05(7) Å. emission profile was determined in solution, glassy 2-methyltetrahydrofurane at 77 K, solid state both room...

The temperature dependence of iridium and ruthenium devices are studied, fundamental assumptions governing their emission challenged.

The effects of annealing on the stoichiometry and electronic structure Co-doped ZnO nanorods (NRs), as prepared by chemical bath deposition (CBD), were investigated photoemission spectroscopies (XPS UPS) X-ray diffraction (XRD). Co 2p core level state as-grown NRs is consistent with a Co3O4 stoichiometry, independent concentration. Upon material above 865 K, satellite forms, which formation CoO. valence band density states also exhibits changes annealing, where new forms between Fermi 1 eV...

Ammonium nitrate is an explosive agent that has a very low vapor pressure, which makes airborne detection challenging. Detection of ammonium been achieved by using silica nanospring mats coated with thin semiconducting layer zinc oxide. The sensor was operated at room temperature and under ambient conditions in air. Lock-in amplification employed to measure the change electrical resistance upon exposure said target gas analyte. showed fast detection, only taking ∼15 s reach its peak...

The effect of UV illumination on the room temperature electrical detection ammonium nitrate vapor was examined. sensor consists a self-assembled ensemble silica nanosprings coated with zinc oxide. mitigates baseline drift resistance relative to operation under dark conditions. It also lowers by 25% compared At high concentrations (120 ppm), recovery time after exposure is virtually identical or without illumination. low (20 assists refreshing stimulating analyte desorption, thereby enabling...

The effects of thermal annealing on the electrical properties randomly oriented ZnO-coated nanospring ensembles were extensively investigated through AC impedance spectroscopy. Annealing mats for an hour at 873 K in air showed significant change ZnO morphology, reduced conductivity due to presence grain boundaries, decreased apparent donor concentration, and faster decay sub-band gap photocurrent. role nanospring-nanospring junctions conduction carriers ensemble was also examined, as well...

A mechano‐reciprocal interaction plays a critical role for cancer cells searching favorable metastasis sites. For this study, we utilized nanoscaffolds that can control the maturation of focal adhesions in order to investigate how mechanically respond their nanoenvironments. We found prostate showed linearly decreasing proliferation rate and mechanical stiffness as size nanoislands on where were grown decreases. This signature was exacerbated less metastatic cells. However, there no...

ZnO was deposited on macroporous α-alumina membranes via atomic layer deposition (ALD) to improve water flux by increasing their hydrophilicity and reducing mass transfer resistance through membrane pore channels. The of systemically performed for 4–128 cycles ALD at 170 °C. Analysis surface contact angles (CA) measurements revealed that the enhanced with number cycles. It observed a vacuum-assisted ‘flow-through’ evaporation method had significantly higher efficacy in comparison...

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Polyurethane has been used for years as an anti-corrosion coating due to its intrinsic hydrophobic properties. However, hydrophobicity is not enough inhibit the permeation of corrosive agents; thus, incorporating it with polyurea would further enhance In this study, coconut oil, a saturated, low molecular weight vegetable was employed eco-friendly precursor synthesizing novel poly(urethane-urea)- based hybrid coating. The synthesis process involved utilization oil-based polyol blend,...

Perovskite light-emitting electrochemical cells (PeLECs) utilize ionic redistribution to emit light efficiently from single layer devices. As demonstrated by Jason D. Slinker and co-workers in article number 2000226, PeLECs show 100 h operation excess of 800 cd m−2 extrapolated lifetimes 6700 at with an optimal concentration a lithium salt additive. Electrochemical impedance spectroscopy reveals additives enhance efficiency through improved electrical double formation.

A resistive switching ZnO n–n homojunction diode fabricated with a stack of two dissimilar thin films shows promising characteristics necessary to address the crosstalk problem in crossbar memory array. The device has characteristic I–V-hysteresis loop forward bias, conjunction its junction characteristics. In ac frequency range 10 Hz–15 kHz, area inside hysteresis initially increased, reaching maximum at 1 and then decreased increasing frequency. corresponds accumulation space charge...