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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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Ignition characteristics of a bio-derived class of saturated and unsaturated furans for engine applications
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Fate of zinc and silver engineered nanoparticles in sewerage networks
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Tribological study of diesel piston skirt coatings in CJ-4 and PC-11 engine oils
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Microstructural engineering of high-power redox flow battery electrodes via non-solvent induced phase separation
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Rational engineering enables co-crystallization and structural determination of the HIV-1 matrix-tRNA complex
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An Engineered Glutamate in Biosynthetic Models of Heme-Copper Oxidases Drives Complete Product Selectivity by Tuning the Hydrogen-Bonding Network
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Engineering Ultra-Low Work Function of Graphene
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Defect Engineering of Ceria Nanocrystals for Enhanced Catalysis via a High-Entropy Oxide Strategy
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The Importance of Salt-Enhanced Electrostatic Repulsion in Colloidal Crystal Engineering with DNA
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Compositional Engineering for Efficient Wide Band Gap Perovskites with Improved Stability to Photoinduced Phase Segregation
Metal halide perovskites are attractive candidates for the wide band gap absorber in tandem solar cells. While their band gap can be tuned by partial halide substitution, mixed halide perovskites often have lower open-circuit voltage than would be expected and experience photoinduced trap formation caused by halide segregation. Here, we investigate solar cell performance and photostability across a compositional space of formamidinium (FA) and cesium (Cs) at the A-site at various halide compositions and show that using more Cs at the A-site rather than more Br at the X-site to raise band gap is more ideal as it improves both VOC and photostability. We develop band gap maps and design criteria for the selection of perovskite compositions within the Cs x FA 1–x Pb(Br y I 1–y ) 3 , space. With this, we identify perovskites with tandem-relevant band gaps of 1.68 and 1.75 eV that demonstrate high device efficiencies of 17.4 and 16.3%, respectively, and significantly improved photostability compared to that of the higher Br-containing compositions.
Next-Generation Lithium Metal Anode Engineering via Atomic Layer Deposition
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