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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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Inch-Size 0D-Structured Lead-Free Perovskite Single Crystals for Highly Sensitive Stable X-Ray Imaging
Not provided.
Quantum-size-tuned heterostructures enable efficient and stable inverted perovskite solar cells
The energy landscape of reduced-dimensional perovskites (RDPs) can be tailored by adjusting their layer width (n). Recently, 2D/3D heterostructures containing n = 1 and 2 RDPs have produced PSCs with > 25% power conversion efficiency (PCE). Unfortunately, this method does not translate to inverted PSCs due to electron blocking at the 2D/3D interface. Here we report a method to increase the layer width of RDPs in 2D/3D heterostructures in order to address this problem. We discover that bulkier organics form 2D heterostructures more slowly, resulting in wider RDPs; and that small modifications to ligand design induce preferential growth of n ≥ 3 RDPs. Levering these insights, we developed efficient inverted PSCs (certified 23.91% quasi-steady state efficiency). Furthermore, unencapsulated devices operate at room temperature and ~50% relative humidity for over 1000 hrs without loss of PCE; and, when subjected to ISOS-L3 accelerated aging encapsulated devices retain 92% of PCE after 500 hrs.
The effect of aromatic ring size in electron deficient semiconducting polymers for n-type organic thermoelectrics
Abstract not provided
Aircraft measurements of single particle size and composition reveal aerosol size and mixing state dictate their activation into cloud droplets
Activated cloud droplet fraction versus the below-cloud aerosol hygroscopicity for spring and summer campaigns.
Sizing Energy Storage Systems to Mitigate Variability of Renewable Generation for Grid Stability using Inverse Uncertainty Propagation
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Study of the influence of size of a manned lifting body entry vehicle on research potential and cost. Part VI - Research vehicle size selection and program definition Final report
Planning data for assessing utility and cost of manned lifting body entry vehicle research program
Three dimensional beam elements synthesis applications with stress constraints, nonlinear size-stiffness relationships and various size-inertia powers
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Impingement of Water Droplets on a Cylinder in an Incompressible Flow Field and Evaluation of Rotating Multicylinder Method for Measurement of Droplet-Size Distribution, Volume-Median Droplet-Size, and Liquid-Water Content in Clouds
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Geochemistry of grain-size fractions of Luna 24 soil - Comments on 'The lunar regolith: Chemistry and petrology of Luna 24 grain size fractions' by J. C. Laul, O. D. Rode, S. B. Simon, and J. J. Papike
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Impingement of water droplets on a cylinder in an incompressible flow field and evaluation of rotating multicylinder method for measurement of droplet-size distribution, volume-median droplet size, and liquid-water content in clouds
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Dust changes in Sakurai’s Object: new PAHs and SiC with coagulation of submicron-sized silicate dust into 10 μm-sized melilite grains
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