1.Do you know the historical origin of photovoltaic power generation?
![Alexandre-Edmond Becquerel，[alɛksɑ̃dʁ ɛdmɔ̃ bɛkʁɛl]，The photovoltaic effect is also known as the "Becquerel effect".](http://www.goldraintech.com/uploads/1726284590383.png)
In 1839
when the 19-year-old Frenchman Becquerel was doing a physical experiment, he found that when two metal electrodes in a conductive liquid were irradiated with light, the current would be strengthened, thus discovering the "photovoltaic effect";
In 1930
Langer first proposed to use the photovoltaic effect to
make "solar cells" to convert solar energy into electrical energy;
In 1932, Audubot and Stola made the first "cadmium sulfide" solar cell;
In 1941, Orr discovered the photovoltaic effect on silicon; In May 1954, Chapin, Fuller and Pearson of Bell Laboratories in the United States developed a single-crystal silicon solar cell with an efficiency of 6%, which was the world's first practical solar cell. In the same year, Wickel first discovered that silver arsenide had a photovoltaic effect and deposited a cadmium sulfide film on glass to make a solar cell. The practical photovoltaic power generation technology of converting sunlight energy into electrical energy was born and developed.
The second satellite launched by the United States in 1958 was the first application of solar cells in the space field.
In 1960, solar cells were connected to the grid for the first time, marking the official entry of photovoltaic power generation into the power grid and becoming an electric energy that people can use every day.
In 1973, the University of Delaware in the United States built the world's first photovoltaic house.
In 1984, commercial amorphous silicon solar cell modules were introduced.
2.How do photovoltaic cells generate electricity?
Photovoltaic cells are semiconductor devices with light-to-electricity conversion properties. They directly convert solar radiation energy into direct current and are the most basic unit of photovoltaic power generation. The unique electrical properties of photovoltaic cells are achieved by doping certain elements (such as phosphorus or boron) into crystalline silicon, which creates a permanent imbalance in the molecular charge of the material and forms a semiconductor material with special electrical properties. Under sunlight, free charges can be generated
in semiconductors with special electrical properties. These free charges move in a directional manner and accumulate, thus forming an electromotive force at both ends. When the two ends are closed with a conductor, current is generated. This phenomenon is called the "photovoltaic effect", or "photovoltaic effect" for short.
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Post time: Sep-14-2024