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Flexible TEG Using Amorphous InGaZnO Thin Film
摘要： We have demonstrated ?exible thermoelectric generators (TEGs) using transverse type structure with amorphous InGaZnO/Mo and amorphous InGaZnO/ITO materials. The amorphous-InGaZnO (a-IGZO) ?lm has advantages such as its low thermal conductivity and relatively high carrier mobility. Additionally, the a-IGZO ?lm can form on a ?exible substrate using a low temperature fabrication process. The a-IGZO thin ?lms were deposited at room temperature by RF magnetron sputtering on PEN substrate. The thin ?lm TEG can create a temperature difference in the in-plane lateral direction by using a heat guide. For the heat guide, polymer photoresist material (KMPR 1035) was spin-coated and patterned using the standard photolithography process. Metal masks were used for all the deposition steps. A total of 676 a-IGZO/metal paired cells were connected in series. Temperature difference was applied between the heat guide and the back side of the substrate, and it was con?rmed that both temperature difference and Seebeck voltage were generated in the IGZO cell. We have shown that the transparent and ?exible TEG on PEN substrate can be fabricated using a-IGZO with the standard fabrication process.
关键词： thin ?lm,TAOS,Thermoelectric generator,module
更新于2025-09-04 15:30:14
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Luminescent mesoporous films containing europium III complex
摘要： Mesoporous materials have large speci?c area and pore volume, low density, and high mechanical and thermal stability. These materials can be applied as catalysts, shape-selective adsorbents, chemical sensors, and capsules for controlled release of therapeutic agents; they can also be employed in microelectronics, electro-optics, and other emerging nanotechnologies. In this study, we used the sol–gel process to obtain mesoporous silica ?lms by dip coating. A trispyrazolyl borate, or scorpionate (Tp), complex containing europium III was incorporated into a mesoporous silica ?lm via wet impregnation. The silica precursor solution was prepared by homogenizing tetraethylorthosilicate, deionized water, ethanol, and cetyltrimethylammonium bromide. The ?lms were obtained by the dip-coating technique (between one and two depositions) at a deposition rate of 300 mm/min; borosilicate glasses were used as substrates. The ?lms were characterized by X-ray di?raction, infrared spectroscopy, transmittance, and europium III photoluminescence analyses. X-ray di?raction showed that mesoporous silica was present in the substrate. Silica without thermal treatment and silica treated at 200 °C presented pore diameters of 3.75 and 3.45 nm, respectively. Thermal treatment eliminated the surfactant. The excitation and emission spectra con?rmed that the luminescent europium III complex was incorporated into the mesoporous silica ?lm, which can be employed as sensor.
关键词： Mesoporous ?lm,Luminescent sensor,Sol–gel,Dip coating
更新于2025-09-04 15:30:14
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Design and development of Binary Diffractive Germanium Lens by thin film deposition
摘要： The design and development of infrared (λ: [8]–[12] μm) binary diffractive germanium lens (BDGL) by two - steps thin ?lm deposition (Physical vapor deposition (PVD) technique) is presented. The optical design of the required elements using the optical design code Zemax, the design of the 4 steps binary surface and its required metallic masks using the programming language Delphi, the procedures of fabrication, and the measurement of the resulting pro?le, were presented. The comparison between the refractive/diffractive lenses by measuring the minimum resolvable temperature difference (MRTD) shows the advantages of binary diffractive surface.
关键词： binary surface,Diffractive,thin ?lm
更新于2025-09-04 15:30:14