solar energy system
cells are made of special materials called semiconductors such as silicon,
which is currently the most commonly used. Basically, when light strikes the
cell, a certain portion of it is absorbed within the semiconductor material.
This means that the energy of the absorbed light is transferred to the
semiconductor. The energy knocks electrons loose, allowing them to flow freely.
PV cells also all have one or more electric fields that act to force electrons
freed by light absorption to flow in a certain direction. This flow of
electrons is a current, and by placing metal contacts on the top and bottom of
the PV cell, we can draw that current off to use externally. For example, the
current can power a calculator. This current, together with the cell's voltage
(which is a result of its built-in electric field or fields), defines the power
(or wattage) that the solar cell can produce."
To continue, we will discuss the smaller hand held devices
for cell phones and PDAs, all the way to powerful self-contained and fully
remote commercial solar inverter supplier.
Here are several links that describe the use of solar power for mobile computers
and other wireless devices from the Do-It-Yourself perspective.
No comments:
Post a Comment