23 Result(s)
within
Michael F. Toney
Science, Humanities and Social Sciences, multidisciplinary
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Article
Open AccessTuning polymer-backbone coplanarity and conformational order to achieve high-performance printed all-polymer solar cells
All-polymer solar cells (all-PSCs) offer improved morphological and mechanical stability compared with those containing small-molecule-acceptors (SMAs). They can be processed with a broader range of conditions...
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Article
Open AccessHighly stretchable polymer semiconductor thin films with multi-modal energy dissipation and high relative stretchability
Stretchable polymer semiconductors (PSCs) have seen great advancements alongside the development of soft electronics. But it remains a challenge to simultaneously achieve high charge carrier mobility and stret...
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Article
Open AccessGrazing-incidence diffraction reveals cellulose and pectin organization in hydrated plant primary cell wall
The primary cell wall is highly hydrated in its native state, yet many structural studies have been conducted on dried samples. Here, we use grazing-incidence wide-angle X-ray scattering (GIWAXS) with a humidi...
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Article
Open AccessPreferred crystallographic orientation of cellulose in plant primary cell walls
Cellulose, the most abundant biopolymer on earth, is a versatile, energy rich material found in the cell walls of plants, bacteria, algae, and tunicates. It is well established that cellulose is crystalline, a...
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Article
Open AccessSurface regulation enables high stability of single-crystal lithium-ion cathodes at high voltage
Single-crystal cathode materials for lithium-ion batteries have attracted increasing interest in providing greater capacity retention than their polycrystalline counterparts. However, after being cycled at hig...
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Article
Open AccessSubsurface Cooling Rates and Microstructural Response during Laser Based Metal Additive Manufacturing
Laser powder bed fusion (LPBF) is a method of additive manufacturing characterized by the rapid scanning of a high powered laser over a thin bed of metallic powder to create a single layer, which may then be b...
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Article
Open AccessDynamics of pore formation during laser powder bed fusion additive manufacturing
Laser powder bed fusion additive manufacturing is an emerging 3D printing technique for the fabrication of advanced metal components. Widespread adoption of it and similar additive technologies is hampered by ...
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Article
Open AccessTransformation from crystalline precursor to perovskite in PbCl2-derived MAPbI3
Understanding the formation chemistry of metal halide perovskites is key to optimizing processing conditions and realizing enhanced optoelectronic properties. Here, we reveal the structure of the crystalline p...
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Article
Open AccessUnderstanding crystallization pathways leading to manganese oxide polymorph formation
Hydrothermal synthesis is challenging in metal oxide systems with diverse polymorphism, as reaction products are often sensitive to subtle variations in synthesis parameters. This sensitivity is rooted in the ...
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Article
Open AccessThe meniscus-guided deposition of semiconducting polymers
The electronic devices that play a vital role in our daily life are primarily based on silicon and are thus rigid, opaque, and relatively heavy. However, new electronics relying on polymer semiconductors are o...
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Article
Open AccessCoupling between oxygen redox and cation migration explains unusual electrochemistry in lithium-rich layered oxides
Lithium-rich layered transition metal oxide positive electrodes offer access to anion redox at high potentials, thereby promising high energy densities for lithium-ion batteries. However, anion redox is also a...
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Article
Open AccessHigh-fraction brookite films from amorphous precursors
Structure-specific synthesis processes are of key importance to the growth of polymorphic functional compounds such as TiO2, where material properties strongly depend on structure as well as chemistry. The robust...
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Article
Open AccessImpact of interfacial molecular orientation on radiative recombination and charge generation efficiency
A long standing question in organic electronics concerns the effects of molecular orientation at donor/acceptor heterojunctions. Given a well-controlled donor/acceptor bilayer system, we uncover the genuine ef...
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Article
Open AccessThermal engineering of FAPbI3 perovskite material via radiative thermal annealing and in situ XRD
Lead halide perovskites have emerged as successful optoelectronic materials with high photovoltaic power conversion efficiencies and low material cost. However, substantial challenges remain in the scalability...
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Article
Open AccessMeasurement and Modeling of Short and Medium Range Order in Amorphous Ta2O5 Thin Films
Amorphous films and coatings are rapidly growing in importance. Yet, there is a dearth of high-quality structural data on sub-micron films. Not understanding how these materials assemble at atomic scale limits...
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Article
Open AccessThe formation mechanism for printed silver-contacts for silicon solar cells
Screen-printing provides an economically attractive means for making Ag electrical contacts to Si solar cells, but the use of Ag substantiates a significant manufacturing cost, and the glass frit used in the p...
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Article
Open AccessFlow-enhanced solution printing of all-polymer solar cells
Morphology control of solution coated solar cell materials presents a key challenge limiting their device performance and commercial viability. Here we present a new concept for controlling phase separation du...
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Article
Open AccessExtraction of pore-morphology and capillary pressure curves of porous media from synchrotron-based tomography data
The elevated level of atmospheric carbon dioxide (CO2) has caused serious concern of the progression of global warming. Geological sequestration is considered as one of the most promising techniques for mitigatin...
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Article
Ultra-high mobility transparent organic thin film transistors grown by an off-centre spin-coating method
Organic semiconductors with higher carrier mobility and better transparency have been actively pursued for numerous applications, such as flat-panel display backplane and sensor arrays. The carrier mobility is...
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Article
Full open-framework batteries for stationary energy storage
New types of energy storage are needed in conjunction with the deployment of renewable energy sources and their integration with the electrical grid. We have recently introduced a family of cathodes involving ...
