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Some 95% of the global solar power market currently relies on silicon, a relatively efficient material (25% energy conversion) but complex and costly to produce in order to achieve a good level of light absorption. As a result, research is focusing on alternative materials like perovskites, which, although just as efficient as silicon and less expensive to produce, remain unstable especially in the presence of moisture. The solution with the potential to be mass produced the most quickly could therefore be a tandem configuration of silicon and perovskite, delivering over 30% efficiency. This increased efficiency means that a smaller footprint is needed to achieve an equivalent power output, thus reducing costs. And cost is not an insignificant factor given that the energy transition requires widespread deployment of solar PV panels.


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