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- W1974736825 abstract "Abstract To enhance the bulk lifetime of multicrystalline silicon material, gettering of impurities and hydrogen passivation of defects are investigated. In edge-defined film-fed grown (EFG) ribbon silicon, an aluminium-enhanced hydrogenation of defects by silicon nitride has been reported. On thin wafers, the formation of a full area aluminium back surface field will lead to wafer bending due to different thermal expansion coefficients of aluminium and silicon. To circumvent this problem, remote plasma-enhanced chemical vapour deposited (PECVD) silicon nitride (SiNx) as passivation scheme for the front and rear surface is proposed. In this work, the bulk passivation by hydrogenation is investigated using two different hydrogen passivation techniques: (i) passivation in a remote hydrogen plasma and (ii) passivation due to a post-deposition anneal of remote PECVD-SiNx in a lamp-heated conveyor belt furnace. Measurements of the bulk lifetime show that the lifetime improvement due to remote hydrogen plasma passivation degrades under illumination with white light. In contrast, the hydrogen passivation by a post-deposition SiNx anneal is only effective if a phosphorous-doped emitter is present below the SiNx layer during the hydrogenation. This lifetime improvement is stable under illumination." @default.
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- W1974736825 date "2002-04-01" @default.
- W1974736825 modified "2023-10-17" @default.
- W1974736825 title "Hydrogen passivation of defects in EFG ribbon silicon" @default.
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- W1974736825 doi "https://doi.org/10.1016/s0927-0248(01)00172-6" @default.
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