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- W1538674983 abstract "In this paper we introduce a new crystalline silicon (c-Si) solar cell fabrication technology based on thelaser processing of dielectric films to create all the highly-doped regions. We call it DopLaCell (Doped by Laser Cell)structure. The resulting fabrication process can be simplified to just four steps: wafer cleaning, film depositions, laserprocessing and metallization. We used phosphorus-doped silicon carbide stacks (SiCx(n)) and aluminium oxide/siliconcarbide (Al2O3/SiCx) stacks for the creation of n+ and p+ regions respectively. As a proof of concept, 1x1 cm2 solar cellswere fabricated on 0.45 Wcm p-type substrates with promising results. The main feature of DopLaCell structure is thelocation of the emitter at the rear surface consisting of a point-like laser processed n+ regions combined with an inducedinversion layer in between based on the fixed charge density of the SiCx(n) stacks. Solar cells with distance between rearemitter regions or pitch ranging from 200 to 350 μm are characterized resulting in a strong decrease of Fill Factor (FF)from 75.4 to 59.7 %. Suns-Voc measurements show excellent pseudo-FF (p-FF) values beyond 81% in all devicesdemonstrating the high quality of laser doping process and the actual limitation of FF by ohmic losses. Device modellingthrough 3D simulations demonstrates that these ohmic losses are related to the high sheet resistance of the inversion layerinduced in-between n+ regions. We conclude that there is room for improvement to fully develop the potential of this newstructure, particularly for low resistivity n-type substrates where the high fixed charge densities of Al2O3 can help toimprove FF." @default.
- W1538674983 created "2016-06-24" @default.
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- W1538674983 date "2013-11-22" @default.
- W1538674983 modified "2023-09-27" @default.
- W1538674983 title "DopLaCell: a new c-Si solar cell based on laser processing of dielectric films" @default.
- W1538674983 doi "https://doi.org/10.4229/28theupvsec2013-2bv.2.30" @default.
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