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Bigger and Better Perovskite Solar Cells

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Solar cells based on crystals known as perovskites have advanced by leaps and bounds in recent years. Now scientists have found a way to increase perovskite solar cell size while maintaining the device’s high conversion efficiencies.

In the span of less than a decade, the conversion efficiency of perovskite solar cells has grown from 3.8 to 22.1 percent, an unprecedented rise in the field of photovoltaics. Such devices are also appealing because they are much cheaper to make than the silicon wafers used in conventional solar cells.

However, a major drawback of high-efficiency perovskite solar cells is how small they generally are, ranging from 0.04 to 0.2 square centimeters. Currently, the best conversion efficiency of a perovskite solar cell larger than 1 square centimeter is 15.6 percent.