Instructables

Solar Concentration?

I wonder if anyone has tried this, using either a solar cell, or joule thief powered LED in something like a torch head fitment  with a solar cell capping the end of the torch head such that the maximum amount of vsible light is falling on the solar collector and none is going any where else. Although direct sunlight may be ok to power a PV, because of local weather it could still be described as diffuse and tricky to get a constant intensity of light where it is needed. If it were possible get a gain in efficiency this way it also could mean that you are not constrained by the amount of area you need to lay out panels to catch sunlight, the collectorsand lights could be stacked vertically in enclosed units.Apparently PV'sare most efficient in the visible light spectrum which reduces concerns of radiation (UV or IR) If efficiency and power could be increased in this way small units could be joined in series or in gradually  increasing size to power requirements.

Re-design4 years ago
So what is your question?

Are you thinking you'll be able to self power an led by using a solar cell?  Nope, won't work.