فهرس المقالات Passivation

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  1 - Investigation of the impact of different ARC layers using PC1D simulation: application to crystalline silicon solar cells
  Galib Hashmi Mohammad Junaebur Rashid Zahid Hasan Mahmood Mahbubul Hoq Md. Habibur Rahman
  10.1007/s40094-018-0313-0
  AbstractIn this work, the impact of six different anti-reflection coating (ARC) layers has been investigated using PC1D simulation software. Simulation shows that the range of 500–700 nm would be suitable for designing an ARC. Designing a single-layer silicon nitride (S أکثر

  AbstractIn this work, the impact of six different anti-reflection coating (ARC) layers has been investigated using PC1D simulation software. Simulation shows that the range of 500–700 nm would be suitable for designing an ARC. Designing a single-layer silicon nitride (Si3N4) ARC for 600 nm wavelength and with a thickness of 74.257 nm, a silicon solar cell with 20.35% efficiency has been simulated. Very closely followed by a 20.34% efficient silicon solar cell with 74.87 nm thick zinc oxide (ZnO) ARC layer. Significant increase in efficiency has been observed by applying ARC in respect to not applying any kind of ARC. After efficient solar cell modeling, optimum efficiency of 20.67% is being achieved by using SiO2 surface passivation and Si3N4 ARC layer. The effects on voltage, current, photovoltaic efficiency, reflectivity and external quantum efficiency due to ARCs are also represented in this work. تفاصيل المقالة
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  2 - Electrochemical Investigation of Coconut Oil as Green Corrosion Inhibitor for ST37 Carbon Steel Protection
  Mohammad Hossein Ghorbani Arash Ghoorchian Hamideh Kalhor
  The corrosion inhibition of ST37 Carbon Steel in 1.0 M HCl by aquatic extract of coconut has been studied as a possible source of green inhibitor using the potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The aquatic extract of cocon أکثر

  The corrosion inhibition of ST37 Carbon Steel in 1.0 M HCl by aquatic extract of coconut has been studied as a possible source of green inhibitor using the potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The aquatic extract of coconut have many advantages over classical techniques of sample preparation of plant gums (such as drying and solvent reflux).Polarization measurements showed that the extracts act as mixed typed inhibitor but under cathodic control. The passivation layer formed on metal surface, and then inhibits the anodic dissolution of steel. The compounds that available in coconut oil provides a good protection to steel against corrosion by shifting the potential at the noble direction. The Nyquist plots showed that on increasing CW concentration, increases charge transfer resistance and decreases double layer capacitance. The Results obtained from Tafel extrapolation and EIS techniques were in good agreement. SEM studies also help to understand the changes that take place on the surfacelayer with respect to change in CW concentration. تفاصيل المقالة
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  3 - The effect of saccharin on microstructure and corrosion behavior of nanocrystalline nickel thin films in alkaline solution
  Behrooz Shayegh Nima Zaghian
  In this study the effect of crystallite size reduction and microstructure on the electrochemical corrosion behavior of nanocrystalline nickel (NC Ni) were investigated using Tafel polarization and electrochemical impedance spectroscopy (EIS) measurements in 10 wt.% NaOH أکثر

  In this study the effect of crystallite size reduction and microstructure on the electrochemical corrosion behavior of nanocrystalline nickel (NC Ni) were investigated using Tafel polarization and electrochemical impedance spectroscopy (EIS) measurements in 10 wt.% NaOH. NC Ni coatings were produced by direct current electrodeposition using chloride baths in presence and absence of saccharin as a grain refining agent. The crystallite size of NC surface coatings was calculated and analyzed by X-ray diffractometry (XRD). Field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM) were used to study coatings microstructure. The chemical composition of NC surfaces was determined using X-ray energy dispersive spectroscopy (EDS). Our results showed Saccharin decreased the crystallite size but increased the grain size. In addition, corrosion resistance of NC Ni in presence of saccharin increased, which is ascribed to the formation of more stable and protective film. The behavior of passive film growth and corrosion were discussed. تفاصيل المقالة