Shanghai solar energy street light

With the development of economy and the progress of the society, people more and more high to the requirement of energy. Looking for a new energy has become the pressing problem facing mankind. Existing electricity there are four main sources, namely, thermal power, hydropower, nuclear power and wind power. Solar power refers to the need not



with the development of economy and the progress of the society, people is higher and higher demand for energy. Looking for a new energy has become the pressing problem facing mankind. Existing electricity there are four main sources, namely, thermal power, hydropower, nuclear power and wind power. Solar power refers to the don't need to heat treatment under the condition of direct power. It includes photovoltaic and photochemical power generation, light induction electric power generation, power generation and light how do solar panels work? Based on

in physics, solar energy photovoltaic effect, of which two kinds of different material close contact in order to hit by light or other radiant energy in the generated when a voltage. These materials in the solar energy is known as the category of the semiconductor - Both light, street light manufacturer is not a conductor is not allow electronic flow under certain conditions of electrical insulators.

when photons will be electronic and material separation, solar panels will generate electricity. In fact, solar panels composed of a series of smaller units, called the photovoltaic cells, effectively solar energy into electricity.

typical solar panels also include metal frame, glass shell and all kinds of wiring, to allow current to flow from silicon cells. Because solar panels generate dc, therefore also need inverter at home will be a direct current into alternating current (ac), semiconductor type tend to pick up a small positive charge, while the N type semiconductor has a negative charge. Usually semiconductor material doped with impurities, making them easier to supply or accept electronic, because such as silicon or germanium crystals usually don't allow electrons from the atoms move freely. This is very similar to the battery of an electrode relative to the other electrode negative voltage.

the semiconductor can be one of two types: P and N. Each of these semiconductor solar cells will be sandwiched in between two, one is P type and the other one is N ( Looks like a battery) 。 Electrons can travel freely from one side to another side, but can not be passed on in the opposite direction. Imagine a mountain -

Electronic (from the mountain easily To the N side) Down, but can't climb it, To the P side) 。 When USES the energy from the incident light receiving electronic rise to excited state, this situation will happen. If it is not a form of material, free electrons will eventually fall to the ground state. And because of the electronic only flow in a single direction - are allowed From N to P - Photovoltaic effect produce direct current (dc). The current with the voltage of the battery limit of the solar cell can generate power ( Or wattage) 。 With enough energy of each photon release electrons, usually forming holes & throughout; 。 Then the electric field will be the electrons move to the N side and move the hole to the P side.