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A novel miniaturized ultra-wide bandwidth (DC-35 GHz) LC phase delay line (PDL) based on overlapped meander inductors and air-bridge capacitors is proposed and fabricated. Two 45º and 90º PDLs were designed using a semi-lumped model, and the parameters were calculated and optimized based on transmission line theory and 3D simulations. The lengths o...
Citations
... Thus, Raman spectroscopy was carried out to gain a better understanding of phase identification. Raman spectroscopy is also being used to assess crystal quality and identify secondary phases in CZTS thin films [77,78]. ...
In this paper, we report the electrical properties of Al/p-Cu2ZnSnS4 thin film Schottky diode fabricated by a two-step method. Cu2ZnSnS4 ingot was successfully grown by direct melting of the constituent elements, then (CZTS) thin film was grown using thermal evaporation method onto heated Mo substrate temperature at 100 °C. After that, the as-deposited CZTS sample were annealed in a sulfur atmosphere at 400 °C for 30 min. X-ray diffraction analysis reveals a polycrystalline CZTS preferentially oriented along a (112) plane in kesterite structure. For bulk material, the band gap energy is about 1.39 eV, the complex impedance plots display a semicircle with an equivalent circuit consisting of a parallel RC circuit connected to a series resistor. The CZTS thin film was investigated in the way of structural and electrical properties. Raman spectra ensured formation of kesterite CZTS phase. Dense and polycrystalline surface features were observed in SEM images of CZTS thin film. The I–V characteristics showed that a Schottky contact was obtained between Aluminum and p-Cu2ZnSnS4 absorber layer. Characteristic parameters such as saturation current, ideality factor and series resistance were calculated from the experimental I–V data. These parameters showed significant electrical properties such as low series resistance and an ideality factor between 1 and 2. Finally, the Arrhenius diagram provided a very low activation energy of about 2.03 meV.
... 31 Thermal behavior of silicon-Pyrex micro heat pipe 32 and tribological behaviour of multi-walled carbon nanotube films are investigated. 33 Besides, the research of measurement of relative permittivity of LTCC ceramic at different temperatures, 34 mechanical properties of single-layer graphene nanoribbons through bending experimental simulations, 35 miniaturized overlapped LC phase delay line, 36 non-linear dynamic characteristics and optimal control of giant magnetostrictive film subjected to in-plane stochastic excitation 37 and the adsorption properties of CO molecules on single-layer grapheme nanoribbons 38 are provided. ...
