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How many more years do you have to go? <a href=" http://www.brainsatwork.nl/help-on-writing-a-thesis#clothing ">essay helen keller</a> The inventor of DSSCs, Professor Michael Graetzel of the École Polytechnique Fédérale de Lausanne (EPFL), Switzerland, announced in a paper in the journal Nature, a new two-step process for DSSC fabrication which raises the efficiency of these cells to 15%. |
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