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How does an antireflection coating improve a solar cell's performance?
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solar cell
A commonly used solar cell structure. In many such cells, the absorber layer and the back junction layer are both made of the same material.
An antireflection coating improves a solar cell's performance by minimizing the loss of light caused by reflection at the cell's surface. By reducing this reflection, the coating effectively traps more incoming light and promotes its transmission into the energy-conversion layers located beneath the surface.12
Typically composed of materials such as silicon nitride, or oxides of silicon, tantalum, or titanium, these coatings are applied to the front of the cell to ensure that a greater portion of the sunlight striking the device actually enters it. This process is essential because any light reflected away from the surface cannot be absorbed to excite electrons, thereby limiting the cell's potential to generate an electric current.12