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Author: Subject: Molecular Sensitizes for Dye-Sensitized Devices
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[*] posted on 6-7-2014 at 13:03
Molecular Sensitizes for Dye-Sensitized Devices


Ok so I have been doing some research (googling) on Dye Sensitized solar cells and I began wondering what makes the dye in them so prone to giving up elections upon excitation from light. Which broght me into molecular sensitizers. What I am wondering is how and why molecules like (but not necessarily) ruthenium-polypyridine dye, or copper-diselenium [Cu(In,GA)Se2], or 1-ethyl-3 methylimidazolium tetrocyanoborate [EMIB(CN)4] to name a few work the way they do? What groups in these compounds actually give up an electron? Why is there so much organic "shrubbery" around most of them? What makes one dye better than another?


A nice detailed response or links to some papers would be greatly appreciated!




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[*] posted on 6-7-2014 at 14:08


To answer a small part of your question, one major factor in what makes a good dye is its stability in the presence of UV light. If you make a DSSC with blueberry juice, for example, it does not last very long, from personal experience.
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[*] posted on 6-7-2014 at 14:41


Yeah that do! What would make one more stable in high energy conditions?



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[*] posted on 6-7-2014 at 15:22


Simply, one can use UV-blocking glass. This can greatly prolong the life of the dyes. As to the chemistry of it, someone else will have to answer that. It's over my head.
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