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Glossary

Silicon

It is a chemical element which has the symbol Si. Silicon is the second most abundant element (after oxygen) on Earth. Silicon is widely used in semiconductor and solar industries.

Silicon Dioxide

It is an oxide of silicon with a chemical formula of SiO2. Silicon dioxide is most commonly found in nature as sand or quartz.

Metallurgical Silicon

It is made from silicon dioxide and it is at least 98% pure.

Polysilicon

It is a primary raw material for solar cells and semiconductor devices. Based on the purity, it can be divided into solar grade polysilicon (6N or above) and electronic grade (11N or above)

MW

Megawatt, one thousand kilowatts or one million watts

Kyropoulos Method

Kyropoulos Method: The “Kyropoulos” is a crystal growth method, which was firstly introduced by Kyropoulos in 1926, after it was improved by Musatov in the former Soviet Union the method is used in the preparation of sapphire crystal.

hour angle
The included angle between the projection of the Sun on the equatorial plane at a certain moment and the projection of the Sun on the equatorial plane at noon.
solar declination
The included angle between the line from the center of the Earth to the center of the Sun and the equatorial plane (such angle in the Northern Hemisphere is positive)