by Q. AB.January 5, 2010
Silicon is electrically neutral and on that the extra protons in the phosphorus balance out electrons, the missing protons in the boron balance out the missing electrons holes. That neutrality is disrupted when the holes and electrons mix at the junction between N-type and P-type silicon. This electric field works as a diode, which allow electrons to flow from the P side to the N side, but not to other way around. Its function is just like a hill that electrons can easily go down the hill (to the N side), but cant climbs it (to the P side).A PV cell absorb sunlight at most 25% but usually that’s 15% or less.
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Anatomy,
antireflective,
coating,
diode,
electrons,
equilibrium,
external current,
glass cover plate,
light,
N side,
N-type,
negative,
P side,
P-type,
phosphorus,
photons,
positive,
protons,
PV modules,
silicon,
Solar cell,
sunlight
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by Q. AB.December 22, 2009
Electric generator is a device or machines that covert the mechanical energy into electrical energy. It’s based on the principal of electromagnetic induction that is scientific law, which was discovered by British scientist Michael Faraday and American scientist Joseph Henry in 1831.
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American scientist,
amps,
British scientist,
DC generators,
device,
electric current,
Electric generator,
electrical energy,
electromagnetic induction,
electromechanical,
electrons,
Faraday disc,
generator,
Joseph Henry,
machines,
Magnethydrodynamic,
mechanical energy,
mechanical force,
Michael Faraday,
scientific law,
scientific principle,
voltage,
volts
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