Why CdS/CdSe are more widely used as quantum dots?

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bluejay27
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Compared to other semiconductor materials, why is CdS/CdSe being more widely used as quantum dots?
 

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Bystander said:
Cost? The stuff's cheap.
I read that CdS/CdSe are byproducts of iron fillings. They were treated as waste in the past...
 

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