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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Defects in local atomic structure of ZnO films sensitized with tinto and mangrove organic dyes
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Multifunctional smart electronic skin fabricated from two-dimensional like polymer film
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Nanostructured Pr-doped Ceria (PCO) thin films as sensing electrodes in solid-electrolyte type gas sensors with enhanced toluene sensitivity
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Strong cube-textured titanium nitride conductive films directly on flexible metal substrate
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Reveal of Magnetic Domains and Tunable Supercell Structures in Two-dimensional Layered Oxide Thin Film via Differential Phase Contrast Imaging and Atomic-resolution STEM
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Reduced recombination via tunable surface fields in perovskite thin films
Here, the ability to reduce energy loss at semiconductor surfaces through passivation or surface field engineering is an essential step in the manufacturing of efficient photovoltaic (PV) and optoelectronic devices. Similarly, surface modification of emerging halide perovskites with quasi-two-dimensional (2D) heterostructures is now ubiquitous to achieve PV power conversion efficiencies (PCEs) >25%, yet a fundamental understanding to how these treatments function is still generally lacking. Here we use a unique combination of depth-sensitive nanoscale characterization techniques to uncover a tunable passivation strategy and mechanism found in perovskite PV devices that were the first to reach the >25% PCE milestone. Namely, treatment with hexylammonium bromide leads to the simultaneous formation of an iodide-rich 2D layer along with a Br halide gradient that extends from defective surfaces and grain boundaries into the bulk three-dimensional (3D) layer. This interface can be optimized to extend the charge carrier lifetime to record values >30 μs and to reduce interfacial recombination velocities to values as low as <7 cm s −1 .
Role of the electronically-active amorphous state in low-temperature processed In2O3 thin-film transistors
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High-performance magnesium metal batteries via switching the passivation film into a solid electrolyte interphase
Mg 2+ electroplating has been an obstacle for Mg metal batteries due to the passivating nature of Mg metal. Here, a unique current collector based on an amorphous MgO-wrapped Zn-skeleton enabled Mg 2+ electroplating for a high-voltage Mg metal battery.
Amorphous-to-crystalline transition of thin-film TiO2 precursor films to brookite, anatase, and rutile polymorphs
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A thermometric film simulator and an application to the film mount of the Arcasonde 1A sensor Progress report
FORTRAN computer program for calculating time dependent temperature distribution over planar thin plates with arbitrary distribution of conductive, convective, and radioactive data
Plasma etching of poly/N,N'-/p,p'- oxydiphenylene/pyromellitimide/ film and photo/thermal degradation of etched and unetched film
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Influence of aluminum oxide film on thermocompression bonding of gold wire to evaporated aluminum film
The influence of Al surface condition on the thermocompression bonding of Au wires to Al electrodes for integrated electric circuits was studied. Au wires were connected to Al electrodes by nail-head bonding after various Al surface treatments. Bonding was evaluated by measuring the wire pull strength and fraction of the number of failures at Au-Al bonds to the total number of failures. Dependence of the fraction on applied load was derived theoretically with a parameter named critical load to take into consideration the differences in Al surface condition. The relation also held explicately for various surface treatments. Characterization of the Al surface was carried out by electron microscopy for chemical analysis.
Formation of Sulfide Films on Steel and Effect of Such Films on Static Friction
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Bonding of Molybdenum Disulfide to Various Materials to Form a Solid Lubricating Film II : Friction and Endurance Characteristics of Films Bonded by Practical Methods
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Inorganic-organic hybrid thin-film transistors using inorganic semiconducting films
Inorganic semiconducting compounds, composites and compositions thereof, and related device structures.
Inorganic-organic hybrid thin-film transistors using inorganic semiconducting films
Inorganic semiconducting compounds, composites and compositions thereof, and related device structures.