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- W2783203480 abstract "The presence of copper (Cu) contamination is known to cause relevant light-induced degradation (Cu-LID) effects in p-type silicon. Due to its high diffusivity, Cu is generally regarded as a relatively benign impurity, which can be readily relocated during device fabrication from the wafer bulk, i.e. the region affected by Cu-LID, to the surface phosphorus-doped emitter. This contribution examines in detail the impact of gettering by industrially relevant phosphorus layers on the strength of Cu-LID effects. We find that phosphorus gettering does not always prevent the occurrence of Cu-LID. Specifically, air-cooling after an isothermal anneal at 800°C results in only weak impurity segregation to the phosphorus-doped layer, which turns out to be insufficient for effectively mitigating Cu-LID effects. Furthermore, we show that the gettering efficiency can be enhanced through the addition of a slow cooling ramp (-4°C/min) between 800°C and 600°C, resulting in the nearly complete disappearance of Cu-LID effects." @default.
- W2783203480 created "2018-01-26" @default.
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- W2783203480 date "2018-01-01" @default.
- W2783203480 modified "2023-09-27" @default.
- W2783203480 title "Cu gettering by phosphorus-doped emitters in<i>p</i>-type silicon: Effect on light-induced degradation" @default.
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- W2783203480 doi "https://doi.org/10.1063/1.5012680" @default.
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