A Complete Guide of "How Solar Cells Work"

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Electricity is pretty old - one of the oldest things ever really. The Universe is thought to be about 13.7 billion years old and electricity - the flow of charge - has been around for nearly all of it. But it is only in the last two centuries that humans have learnt how to make charges flow around circuits and do things for us; that is, make electricity. First, a bit about charge. We know three fundamental things about charge:
1. There are two types.
2. Different charges attract each other.
3. Like charges repel each other.   more...