Results 11 to 20 of about 2,665,933 (332)
Sequential vacuum-evaporated perovskite solar cells with more than 24% efficiency
Science Advances, 2022 Vacuum evaporation is promising for the high-throughput fabrication of perovskite solar cells (PSCs) because of its solvent-free characteristic, precise control of film thickness, and compatibility with large-scale production.
Hang Li +11 more
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Development and Application Prospect of Space Electric Propulsion Technology
气体物理, 2023 Space electric propulsion technology has entered a new stage of maturity and full application in China. In order to further promote and accelerate the development of electric propulsion technology, this paper adopted the methods of investigation and ...
Hai GENG +8 more
doaj +1 more source
Advances in Materials Science and Engineering, 2022 A range of titanium diaphragms for spacecraft propellant tanks are designed in detail, and two typical titanium diaphragms were manufactured and corresponding reversal tests were developed.
Tianju Ma +5 more
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Frontiers in Physics, 2022 In order to get a better tradeoff between the long lifetime and high performances of cesium beam atomic clocks, we proposed a design scheme of compact optically pumped cesium beam tube (OPCBT) based on hexapole magnetic focusing (HMF) system for the ...
Haijun Chen +3 more
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Vacuum ultraviolet nonlinear metalens
Science Advances, 2022 Vacuum ultraviolet (VUV) light plays an essential role across science and technology, from molecular spectroscopy to nanolithography and biomedical procedures.
Ming Lun Tseng +13 more
semanticscholar +1 more source
Vacuum Gasification-Directional Condensation for Separation of Tellurium from Lead Anode Slime
Metals, 2021 Tellurium is the indispensable base material of semiconductors in solar panels. Traditional tellurium recycling, a highly complicated separation process, has exhausted reagents and energy sources whilst producing waste residue and water containing ...
Zhe Gao +7 more
doaj +1 more source
Spatial evolution characteristics of ion and electron flow for 300 W class low-power Hall thruster
AIP Advances, 2021 The Faraday probe and cylindrical Langmuir probe were used to characterize the downstream ion and electron spatial evolution of a 300 W class low-power Hall thruster.
Xinwei Chen +10 more
doaj +1 more source
Cosmological constant—the weight of the vacuum [PDF]
, 2002 Recent cosmological observations suggest the existence ofa positive cosmological constantwith the magnitude (G˝=c 3 ) ≈ 10 −123 . This review discusses several aspects ofthe cosmological constant both f rom the cosmological (Sections 1- 6) and .eld ...
T. Padmanabhan
semanticscholar +1 more source
Three-pion contribution to hadronic vacuum polarization [PDF]
Journal of High Energy Physics, 2019 We address the contribution of the 3π channel to hadronic vacuum polarization (HVP) using a dispersive representation of the e+e− → 3π amplitude. This channel gives the second-largest individual contribution to the total HVP integral in the anomalous ...
M. Hoferichter, Bai-Long Hoid, B. Kubis
semanticscholar +1 more source
Vacuum energy and Universe in special relativity [PDF]
, 2003 The problem of cosmological constant and vacuum energy is usually thought of as the subject of general relativity. However, the vacuum energy is important for the Universe even in the absence of gravity, i.e.
A. Einstein +6 more
core +3 more sources