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[IEEE 2018 IEEE 21st International Multi-Topic Conference (INMIC) - Karachi, Pakistan (2018.11.1-2018.11.2)] 2018 IEEE 21st International Multi-Topic Conference (INMIC) - Silica Nano-Particulate Coating Having Self-Cleaning and Antireflective Properties for PV Modules
摘要： In this research, silica nanoparticles are coated over the solar PV module glass to acquire super hydrophilic, antireflective and highly transparent surface. Silane precursor mixed with air sprayed on the substrate by aerosol deposition method. Pressure difference between the plasma chamber and the substrate is tuned by the introduction of helium gas, which results in good control over layer thickness and refractive indices. Due to the porous nature and graded index of coated film, the transmittance of glass substrate is increased from 91% to 99.2%. Surface topology of coated film is studied by AFM shows excellent antifogging and super-hydrophilic nature attributed to roughness and nano-porosity of coated film. Moreover, the super-hydrophilic nature endows these coatings with self-cleaning properties, which further enhances the overall efficiency of solar PV modules.
关键词： Antireflective coatings,Super-hydrophilic,Silica nanoparticles,Thin films,solar PV,Aerosol deposition,Nano-porous
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE SENSORS - New Delhi, India (2018.10.28-2018.10.31)] 2018 IEEE SENSORS - Patterning and Annealing Effects of Aerosol Deposited Hygroscopic Films for Humidity Sensors
摘要： In this study, three inter-digital capacitors (IDCs) and one spiral structure is decorated with aerosol-deposited (AD) BaTiO3 thin film layer. Further, these structures have used for capacitive sensing applications. All, the results have been measured at 1 MHz frequency in room temperature. The obtained results indicate that the annealed aerosol-deposited based BaTiO3 thin film has presented higher capacitive intensity as well as the improvement in dielectric performances. The dissimilar finger width inter-digital capacitors (IDCs) and a spiral structure have evaluated with different open area ratio (OAR). The obtained results clearly indicate that the fourth sensor design gives best results before annealing due to its structural property. Whereas, second sensor design gives best results after annealing process. The sensitivity of second sensor design enhanced from 15.83 to 1300 after annealing. Hysteresis loss result has also been used to verify the highly sensitive design. Through minimum hysteresis loss and high correlated absorption and desorption value indicates highly sensitive sensing design. The structural property of aerosol-deposited BaTiO3 film has evaluated by SEM and XRD measurements. These measurements show the high grain size, good crystallization and high surface to volume ratio after thermal treatment. Our research also shows that good design structure with thermally modified AD BaTiO3 film can be used to design an attractive sensor in future.
关键词： hysteresis loss,Aerosol Deposition (AD),inter-digital capacitors (IDCs),open area ratio (OAR)
更新于2025-09-19 17:15:36
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Formation of silver films for advanced electrical properties by using aerosol deposition process
摘要： A simple room temperature aerosol deposition (AD) process was used to fabricate silver thick films for high efficiency metallization that can be applied to decrease the resistance–capacitance delay and increase the signal propagation speed in integrated circuits. To obtain more advanced performance than aerosol-deposited silver films reported in previous studies, experimental parameters (orifice size of nozzle and gas consumption) that could directly affect electrical resistivity were optimized in advance. The proper small orifice size was selected for facilitated reduction of electrical resistivity by activating the percolation effect and making more conduction channels. High gas consumption also reduced the electrical resistivity of the silver films, forming plenty of metal clusters. Using experimental parameters that showed the lowest resistivity, silver thick films were fabricated via the AD process and their properties were analyzed. The results of the X-ray diffraction confirmed that the silver particles underwent impact-induced plastic deformation. As the film thickness was thickened up to 12 scans, the collided particles filled up the rough alumina substrate. After 12 scans, the silver films became densified due to severe plastic deformation of the as-deposited silver particles. Therefore, the growth mechanism suggests that most silver particles in the initial deposition step contribute to mechanical interlocking, and the subsequent particles could lead to film densification.
关键词： aerosol deposition,electrical resistivity,silver films,metallization,integrated circuits
更新于2025-09-04 15:30:14