175:(poly-Si) which consists solely of crystalline silicon grains, separated by grain boundaries. The difference comes solely from the grain size of the crystalline grains. Most materials with grains in the micrometre range are actually fine-grained polysilicon, so nanocrystalline silicon is a better term. The term Nanocrystalline silicon refers to a range of materials around the transition region from amorphous to microcrystalline phase in the silicon thin film. The crystalline volume fraction (as measured from
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concentration. Although it currently cannot attain the mobility that poly-Si can, it has the advantage over poly-Si that it is easier to fabricate, as it can be deposited using conventional low temperature a-Si deposition techniques, such as
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phase. Where they differ, however, is that nc-Si has small grains of crystalline silicon within the amorphous phase. This is in contrast to
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A few companies are on the verge of commercializing silicon inks based on nanocrystalline silicon or on other silicon compounds. The
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industry is also investigating the potential for nanocrystalline silicon, especially in the memory area.
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nc-Si has many useful advantages over a-Si, one being that if grown properly it can have a higher
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The main application of this novel material is in the field of silicon
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part of the spectrum for the bottom cell in nanocrystalline Si.
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or high temperature CVD processes, in the case of poly-Si.
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336:Understanding Of Nano Science And Technology
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