New energy should meet two conditions at the same time: first, it is rich and will not be exhausted; Second, it is safe and clean, and will not threaten human beings and destroy the environment. There are two kinds of new energy sources discovered, one is solar energy and the other is fuel cell. In addition, wind power generation can also be regarded as an auxiliary new energy source.
The solar energy shining on the earth is very huge. The solar energy that irradiates the earth for about 40 minutes is enough for the global human energy consumption in one year. It can be said that solar energy is a truly inexhaustible energy source. Moreover, solar power generation is absolutely clean and will not cause public hazards. So solar power generation is considered as an ideal energy source.
To obtain electricity from solar energy, it is necessary to carry out photoelectric conversion through solar cells. It is completely different from other power generation principles in the past and has the following characteristics:
(1) there is no danger of failure;
② Absolutely clean (pollution-free);
(3) Not limited by the geographical distribution of resources;
(4) It can generate electricity nearby;
⑤ High energy quality;
⑥ Users are easy to accept emotionally;
⑦ It takes a short time to get energy.