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In this work we characterize height-selective emitters. The concept of a height-selective emitter is similar to the classical selective emitter but applied on a much smaller scale. Concretely, we masked textured wafers by a spin coating oxide. Scanning electron microscopy (SEM) analysis revealed that only the valleys between the tips of the pyramids are covered by the oxide while the tips are open...
One important parameter for modelling emitter recombination is the surface recombination velocity (SRV), which strongly depends on the surface doping concentration and the applied surface passivation. However, for highly phosphorus-doped surfaces with concentrations in excess of 2×10 20 cm -3 , where not all of the dopant is electrically activated, data is hardly available in the literature...
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