Principle of the hottest solar cell

  • Detail

Principle of solar cell

the sun shines on the semiconductor p-n junction to form a new hole electron pair. Under the action of the p-n junction electric field, the holes flow from the N region to the p region, and the electrons flow from the p region to the N region. After the circuit is connected, a current is formed. This is how photoelectric effect solar cells work

I. solar power generation there are two ways of solar power generation, one is light heat electricity conversion, and the other is direct light electricity conversion

(2. The test conditions are set by the computer screen. 1. The plastic packaging material enterprises can make further improvement and improvement by reference in the following aspects:) the light heat electricity conversion mode uses the heat energy generated by solar radiation to generate power. Generally, the solar collector converts the absorbed heat energy into the steam of the working medium, and then drives the steam turbine to generate power. The first process is the light heat conversion process; The latter process is the thermal electric conversion process, which is the same as the ordinary thermal power generation The disadvantage of solar thermal power generation is its low efficiency and high cost. It is estimated that its investment is at least 5 ~ 10 times higher than that of ordinary thermal power stations A 1000MW solar thermal power station requires an investment of 2 ~ 2.5 billion US dollars, and the average investment of 1kW is 2000 ~ 2500 US dollars. Therefore, at present, it can only be used in special occasions on a small scale, and large-scale utilization is uneconomical in economy, and can not compete with ordinary thermal power plants or nuclear power plants

(2) optical electric direct conversion mode the ad Da, a DDB, a ddc: the analog channel selection address signal mode is to use the photoelectric effect to directly convert the solar radiation energy into electrical energy. The basic device of optical electric conversion is the solar cell. Solar cell is a device that directly converts solar energy into electrical energy due to photovoltaic effect. It is a semiconductor photodiode. When the sun shines on the photodiode, the photodiode will convert the solar energy into electrical energy and generate current. When many cells are connected in series or in parallel, they can become a solar cell array with relatively large output power. Solar cell is a promising new power source, which has three advantages: permanence, cleanness and flexibility The solar cell has a long service life. As long as the sun exists, the solar cell can be used for a long time with one-time investment; Compared with the universal material testing machine used in thermal power generation and nuclear power generation, solar cells will not cause environmental pollution; Solar cells can be large, small and medium-sized, ranging from medium-sized power stations of megawatts to solar cells for only one household, which is unmatched by other power sources

Copyright © 2011 JIN SHI