Photovoltaic glass is a special glass with integrated solar cells that convert solar energy into electricity. This means that the power for an entire building can be produced within the roof and façade areas. The solar cells are embedded between two glass panes and a special resin is filled between the panes, securely wrapping the solar cells on all sides. Each individual cell has two electrical connections, which are linked to other cells in the module, to form a system which generates a direct electrical current.
How does it work?
As seen in the science behind PV, a photovoltaic cell is created when a positively charged (P-type) layer of silicon is placed against a negatively charged (N-type) layer of silicon to create a diode and this diode is connected in a circuit via metal conductors on the top and bottom of the silicon sandwich. Though different types of photovoltaics vary in their structure, they generally include the following elements:
The cell or multiple cells are the core of the photovoltaic panel.
A glass cover is placed over the photovoltaic cell to protect it from the elements while allowing sunlight to pass through to the cell.
An additional plastic anti-reflective sheet is often used to enhance the effect of the glass cover and anti-reflective coating of the cell to block reflection.
A panel backing (typically plastic) and frame complete the photovoltaic panel, holding all the pieces together and protecting it from damage during installation.
The solar cells are embedded between two glass panes, and a special resin fills between the panes, securely wrapping the solar cells on all sides. Each individual cell has two electrical photovoltaic modules (PVs).
The monocrystalline solar cells are opaque, blue, or dark grey to black, and they have a high efficiency (14% to 16%). They are expensive because they are made from silicon crystals in a complicated manufacturing process.
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