green
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why Iodine is used as electrolyte in dye sensitized solar cell
why Iodine is used as electrolyte in dye sensitized solar cell? why not use some other. any sugestion please
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psychokinetic
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When I2 meets UV, it breaks up into I- ions, which are brilliant for doping conductive polymers.
Might not be the answer, and it depends on whether the solar cell uses any conducting polymers....
“If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found
the object of his search.
I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor.”
-Tesla
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Cloner
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Iodine is not merely a conducting electrolyte, it is reversibly reduced and oxidized in this type of solar cell. I2 / 2 I- has just about the right
redox level. Matching energy levels properly is crucial for these cells. Too little potential loss and the current is too small, too much potential
loss and the energy yield suffers.
The problem with iodine solution is that it is liquid state, and solid state is preferred for engineering reasons.
[Edited on 30-9-2010 by Cloner]
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green
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thank you for the response. Cloner you have mentioned that having iodine in liquid state is not desirable for long term stability. can you think of
anything else to replace it with solid state electrolyte.
psychokinetic also pointed out about use of conducting polymer in solar cell, do you think doping conductive polymer with iodine will solve the
problem of using liquid electrolyte in solar cell. could you please elaborate on that. thank you
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not_important
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Doped polymers have been tried, and have difficulties of their own, I believe in part to low mobility of the ions involved and failure to contact as
much surface of the TiO2. Ionic liquids have been investigated as another way of improving the usefulness of iodine/iodide based cells, and
iodine-free approaches.
There's a bit on the subject here
http://pubs.acs.org/doi/abs/10.1021/ar900069p
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psychokinetic
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Quote: Originally posted by Cloner  | Iodine is not merely a conducting electrolyte, it is reversibly reduced and oxidized in this type of solar cell. I2 / 2 I- has just about the right
redox level. Matching energy levels properly is crucial for these cells. Too little potential loss and the current is too small, too much potential
loss and the energy yield suffers.
[Edited on 30-9-2010 by Cloner] |
That makes a lot more sense. As Not Important said, the idea of using the I- is difficult.
[Edited on 30-9-2010 by psychokinetic]
“If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found
the object of his search.
I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor.”
-Tesla
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