Build your own solar cell
a couple of years ago I found the following article which I reencontarme, of course, the network of networks. is an article on how to build a home photovoltaic solar cell. The paper examines the phenomenon in which the cell is based construct (artificial photosynthesis) but for those who never read the manuals and I look forward to the steps ahead.
The full article is available at the following web page even sell a kit to make them:
But before the movers think plant cells assemble a home or think someone set up a solar farm with these cells must be noted that although these cells work perfectly a problem they have is to work with organic matter and therefore their degradation rates are high enough so that, for now, has rejected large-scale commercialization. I say for now, because some Australian research center has already experimented with them and managed to isolate the components so that the degradation is within acceptable levels and any company, but remember correctly, China has been interested in the product and has purchased farm. I also remember that once Acciona invested 4 million euros in organic solar cell research.
Since I read the article raspberries and blackberries differently ...
For the above, I advance here and are built:
Step 1 - Coloring Titanium Dioxide natural dye: Color the white side of the glass plate covered with titanium dioxide (TiO2). This glass has been previously coated with a transparent conductive layer (SnO2), and deposited a porous film of TiO2. Crushed blackberries (fresh or frozen), raspberries, pomegranate seeds, or red hibiscus tea in a bucket of water. Soak the film for 5 minutes in a liquid to color film to achieve a deep purple red. If both sides of the film are not uniformly colored, then be placed back on the juice for 5 minutes. Wash the film with ethanol and dried gently with an absorbent cloth.
Step 2 - Cover the counter: The solar cell needs a positive plate and negative plate for operation. The positive electrode is called the counter, which is formed with a glass substrate with a layer "leader" of SnO2. To identify the driver side of the glass can be used a voltmeter. When scratched with a fingernail, this is the rough side. Mark nonconductive side with a "+". Use a pencil to apply a thin layer of graphite (carbon catalyst) on the driver side of the plate.
Steps 3 and 4 - Add the electrolyte and assembling the solar cell: iodide solution electrolyte used in the solar cell to close the circuit and to regenerate the dye. Place the colored plate so that the coated side of the film this up, then put one or two drops of iodine solution on the colored part of the film. Then place the counter on the colored film to the driver side of the counter is about the movie. Balancing the plate so that the edges of each board are exposed. These will point of contact for positive and negative electrodes so that we can extract electricity and test the solar cell performance.
Use two clamps to hold together the two electrodes at the corners of the plates. 
The output is approximately 0.43 V and 1 mA / cm 2 when the cell is illuminated in a sun through the TiO2 film.
I have memory and I put the website of the company that intends to commercialize solar cells based on this principle and information, also in English, wikipedia:
wikipedia (English)
Australian Company (Dyesol)
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