Conventional tandem solar cells can already convert this light into electricity more efficiently compared to traditional silicon-only solar cells by absorbing additional wavelengths of light. "Tandem solar cells that pair silicon with a metal halide perovskite are a promising option for surpassing the single-cell efficiency limit," write the researchers in their published paper. Introduction Photovoltaic is the fastest growing energy source in the electricity sector. Now, the researchers have realized that even more energy can be gathered using a two-sided tandem configuration. This resulted in a cell that demonstrated the capability to convert 29.15% of the incident light into electrical energy. Tandem Solar Systems is the wholesale solar components division of family-owned Tandem Solar, Inc.. Tandem Solar Systems was created to support the hardworking professional solar installers and DIY solar installers with solar components at near direct pricing, allowing them to be competitive with the financial institution-backed solar installers. Now, the researchers have realized that even more energy can be gathered using a two-sided tandem … The website forms part of the Physics World portfolio, a collection of online, digital and print information services for the global scientific community. 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One method to increase the efficiency of a solar cell is to split the spectrum and use a solar cell that is optimised to each section of the spectrum. Solar cells consisting of two semiconductors with differing band gaps can achieve considerably higher efficiencies when used in tandem compared to the individual cells on their own. In Albrecht and colleagues’ experiments, the fill factor depends on how many charge carriers are “lost” on their way out of the SAM-perovskite interface. Mechanically-stacked perovskite+silicon tandem solar panels provide a unique opportunity for solar to reach new heights. They also retain 95% of their initial efficiency even after 300 hours of operation and have an open-circuit voltage as high as 1.92 V. Solar cells containing two photoactive semiconducting materials with different but complementary electronic band gaps can reach much higher PCEs when used in a tandem configuration than either material on its own. 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