What is Solar Photovoltaic Glass?

This article explores the classification and applications of solar photovoltaic glass. Photovoltaic glass substrates used in solar cells typically include ultra-thin glass, surface-coated glass, and low-iron (extra-clear) glass.

Why is Solar Photovoltaic Glass so popular?

With global attention on environmental protection and energy efficiency steadily rising, the demand for solar photovoltaic glass in both commercial and residential construction sectors has significantly increased. The desire to reduce energy costs and carbon footprint has driven the widespread adoption of solar photovoltaic glass.

Can glass be used as a substrate for solar cells?

According to reports, Germany was the first country to use transparent flat glass as a substrate for developing solar cells. German scientists installed these plate-shaped solar cells as window glass on buildings. They could directly supply the captured electrical energy to occupants and feed excess electricity into the grid.

How much iron is in solar glass?

As one of the most crucial components of solar installations, photovoltaic glass demands high transparency. Therefore, strict requirements are imposed on the iron content in the silicon raw materials used for producing solar glass, with Fe2O3 content typically ranging from 140 to 150 ppm.

What are the different types of Photovoltaic Glass?

These three products have entirely different characteristics and functions, leading to significant differences in their added value. Currently, the most widely used photovoltaic glass is high-transparency glass, known as low-iron glass or extra-clear glass. Iron in ordinary glass, excluding heat-absorbing glass, is considered an impurity.

How does iron affect the color of glass?

The presence of iron impurities not only causes the glass to become colored but also increases its heat absorption rate, thereby reducing its light transmission. Iron in glass comes from raw materials, refractory materials, or metal equipment used in production, and it is impossible to completely avoid its presence.