Browsing by Author "Zerga, Abdellatif"

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    Electrical Characterization Of Passivation Layers For P-type Multi Crystalline Silicon Ewt Solar Cells By Numerical Simulation
    (Oum-El-Bouaghi University, 2017) Benabadji, Batoul; Zerga, Abdellatif; Lachachi, Hanane
    In this study, the dielectric effects on solar cell efficiency were investigated. Different materials, such as Al2O3, HfO2, TiO2 and SiO2, were deposited by various techniques on the front side of a p-type EWT (Emitter Wrap Through) multi crystalline silicon (mc-Si) solar cell. The passivated layer thickness was optimized using the software Matlab. The recombination velocities utilized in the simulation were taken from the literature. Using the software TCAD (2D) Silvaco/Atlas, the best results (for electrical parameters) were achieved with TiO2 (refractive index n = 2.6 at λ= 620 nm) for a thickness of 5 nm; a solar cell efficiency around 20.5% was obtained
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    Numerical Modelling Of Boron Diffusion For Micro-pyramidal Textured N-type Silicon
    (Oum-El-Bouaghi University, 2016) Lachachi, Hanane; Zerga, Abdellatif; Benabadji, Batoul
    The formation of the emitter is considered as a crucial technological sequence during the manufacture of solar cells the thermal diffusion from a solid source in acylindrical quartz tube constitutes the most widely know and used technique for the formation of the emitter. Indeed, doping of n-type silicon with boron diffusion allows the formation of the p+ emitter. This distribution is often difficult in terms of homogeneity to control and requires adequate detailed understanding of physical phenomena in order to optimize the best profile of dopant diffusion. However, this work is dedicated to the optimization of boron diffusion profile by investigating the effects of temperature and time diffusion on the planar and textured. A comparison with the experimental profile measured by SIMS (Spectroscopy Secondary Ion Mass) was performed. The differences between planar and textured surface are discussed.