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In this work we show a baseline fabrication process of interdigitated back contacted IBC c-Si(p) solar cells, which combines conventional diffusion oven stages to define base p+ and emitter n+/n++ regions at the back side, with outstanding front surface passivation using atomic layer deposited Al2O3 films over random pyramids surfaces. Cells include a selective phosphorous n++ emitter in order to...
In this work we study cost-effective cleaning solutions applied to interdigitated back-contacted solar cells (IBC), which are passivated by means of atomic layer deposited Al2O3 films. The cleaning baths must guarantee very clean surfaces as well as relatively low etching Al2O3 rates to avoid excessive undercutting at the edges of strip-like regions. We compare the standard high-cost cleaning procedure...
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