A beginner's guide to solar energy.
, silicon is arranged into two different layers: the P-type, which can receive electrons, and the N-type, which can give electrons away. The p-type silicon is produced by adding atoms—such as boron or gallium—that have one less electron in their outer energy level than the silicon, creating a vacancy. The n-type silicon is made by including atoms, such as phosphorus, that have one more electron in their outer level than silicon.
Behind the business scenes, scientists have been looking to increase the efficiency of solar panels and, in recent times, have managed to crack the Once installed, solar panels have long lifetimes with very little maintenance needed. Solar panels need to be kept clean for the highest energy conversion efficiency, but other than that require no maintenance since there are no moving parts in the energy generation process. The energy storage end requires maintenance, but the system usually does more than pay for itself in the years of service.
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