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You Asked:
How can I make a simple solar cell? — Shayan, Delhi, India
Marshall Answered:
There isn’t a way for you to make a good solar cell yourself, but there are ways to create devices that produce a little bit of voltage and current in response to sunlight. For example, here is one made from copper flashing:
This page contains an explanation of what is happening: Make a solar cell in your kitchen. The wattage is incredibly tiny.
A slightly better solar cell can be made with titanium dioxide, as shown here:
1) How to Build Your Own Solar Cell
In the following video you see another way to create a solar cell, using titanium dioxide extracted from donuts and a dye extracted from tea (which is similar to the previous idea – a dye-sensitized solar cell):
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