Solar cells are based on the photovoltaic effect and can be divided into three generations. The first generation is represented by silicon solar cells, which dominate the market. The second generation tries to achieve thin-film solar cells, that are cheap. The goal of the third generation is the low-cost production of thin-film solar cells with high efficiency. Most common solar cells of the last generation are CZTS solar cells, organic solar cells, dye-sensitized solar cells, perovskite solar cells and solar cells based on quantum dots. The biggest weakness of this generation is the so far low stability of materials, which can be eliminated with further development and research into alternative materials.
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