Why can't solar panels be another color?

Introduction Why can't solar panels be another color? This is not possible for silicon solar cells. Because this color is an anti-reflective Coati

Why can't solar panels be another color?

This is not possible for silicon solar cells. Because this color is the effect of anti-reflective coating (anti-reflective film layer). Solar panels primarily absorb photons near the green wavelength in visible light. If the solar panel is blue, it means it reflects light of blue wavelength. Black, of course, is not reflective. So black is best, blue is second. If you bought the green one, congratulations, you've been cheated.

There is currently a pigment-sensitized solar cell, which refers to a battery in which a pigment and an electrolyte are added between two transparent electrodes on a glass or plastic substrate. Using this technology, transparent batteries and batteries of different colors can be produced. The efficiency of this type of battery is not high and its price is cheaper than that ofsilicon.

Functional components of thin films deposited on the surface of solar cells

Amorphous silicon cellular glass cannot be used as laminated glass

If it is used as a conductive film deposition material, generally In order to improve light transmission, ultra-white low iron glass is used;

If it is glass for the bottom plate, using float glass will have more advantages than laminated glass. The main reason is that the surface of rolled glass is not as smooth as float glass. During the lamination process, bubble problems are more likely to occur or the middle layer of EVA or PVB film is wasted.

Of course, this can also have a lot to do with design and technology. Currently, most of them use float glass.

The thin film deposited on the surface of the solar cell generally includesment the following functional components:

1. Light absorption layer: The light absorption layer of the solar cell. is the most critical thin film component. It can absorb light energy and convert it into electrical energy. Common light-absorbing layer materials include silicon (Si), copper-indium-gallium selenide (CIGS), copper-indium-sulfur selenide (CISS), etc.

2. Transparent conductive layer: The transparent conductive layer is used to collect the current generated by the photovoltaic cell and transmit it to the external circuit. Common transparent conductive layer materials include tin oxide (SnO2) and indium tin oxide (ITO).

3. Light-reflecting layer (back reflector): the light-reflecting layer is located between the light-absorbing layer and the substrate to improve light utilization.e. It is usually made of metal or metal oxide, such as aluminum (Al), silver (Ag) or aluminum foil (Aluminum Foil).

4. Passivation layer: The battery protective layer is used to protect the surface of the photovoltaic cell from damage caused by the external environment, while reducing the contact between the photovoltaic cell and environmental impurities. Common battery protective layer materials include aluminum oxide (Al2O3), silicon nitride (Si3N4), etc.

5. Encapsulation layer: The encapsulation layer is used to protect photovoltaic cells from external environments such as humidity, oxygen and dust. Common encapsulation layer materials include polymer materials, such as epoxy resin (Epoxy Resin), polymethyl methacrylate (PMMA), etc.

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