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Rached Ganouni,Mourad Talbi,Hatem Ezzaouia 대한전자공학회 2017 Journal of semiconductor technology and science Vol.17 No.6
Si based tandem solar cells speak to a contrasting option to conventional compound III-V multi-junction cells as a promising approach to accomplish high efficiencies. In this paper, we compare between an experimental model of a novel 4-terminal tandem cell design with a back-junction back-contacted (BJBC) c-Si and a theoretical model (proposed in this work) of a new structure of tandem solar cell based on c-Si using Matlab code. The obtained results from the computation of the overall efficiency η, show that we can attain the same efficiency (η = 28%) compared to the experimental model, but with less cost. Moreover, the physics coherence problem is solved with our model.
Ghada Bidouk,Beya Ouertani,Chaker Bouzidi,Bertrand Theys,Hatem Ezzaouia 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.10
Aqueous ruthenium (III) chloride (RuCl3.3H2O) solution (0.03M) was sprayed on pre-heated ordinary glass substrates. Amorphous ruthenium oxide thin films were obtained, which were sulfurized under vacuum at several lower heat treatment temperatures (400, 450, 500 and 550 oC) in RTP oven. The XRD results indicated the appearance of the RuS2 phase for all the sulfurization temperatures. The layer compositions were confirmed by EDS analysis. Monocrystalline and polycrystalline RuS2 thin films were obtained. SEM images showed mix of morphologies (filament, particles, and clusters) with porous surfaces. High absorption coefficients were deduced. The obtained RuS2-thin films showed different direct band gaps (1.43, 1.80, 1.79, 1.83 eV), which make it a distinct energy conversion and storage material. The opto-electrical properties of the as obtained RuS2-thin films make them among the best candidats for several applications, such as low cost material for low cost solar cells, and for alkaline hydrogen evolution electrocatalysts.
Ghada Bidouk,Beya Ouertani,Chaker Bouzidi,Bertrand Theys,Hatem Ezzaouia 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.10
Aqueous ruthenium (III) chloride (RuCl3.3H2O) solution (0.03M) was sprayed on pre-heated ordinary glass substrates. Amorphous ruthenium oxide thin films were obtained, which were sulfurized under vacuum at several lower heat treatment temperatures (400, 450, 500 and 550 oC) in RTP oven. The XRD results indicated the appearance of the RuS2 phase for all the sulfurization temperatures. The layer compositions were confirmed by EDS analysis. Monocrystalline and polycrystalline RuS2 thin films were obtained. SEM images showed mix of morphologies (filament, particles, and clusters) with porous surfaces. High absorption coefficients were deduced. The obtained RuS2-thin films showed different direct band gaps (1.43, 1.80, 1.79, 1.83 eV), which make it a distinct energy conversion and storage material. The opto-electrical properties of the as obtained RuS2-thin films make them among the best candidats for several applications, such as low cost material for low cost solar cells, and for alkaline hydrogen evolution electrocatalysts.