The ability to use perovskites to generate power in space is enticing because they offer a lower-cost and lightweight option to other technologies with the potential for achieving efficiencies similar to those of current space PV technologies.
Just as on Earth, perovskite solar cells need to have suitable durability. However, the environment in space is significantly different. While the biggest challenges on Earth are related to weather, in space perovskites must address the problems that come from radiation bombardment and extreme temperature swings. Perovskites show signs of better tolerance to radiation than many other solar cells, but plenty of testing remains to be conducted.
“We thought it would be impossible for the silicon oxide to provide protection against fully penetrating long-range particles such as the high-energy protons and alpha particles,” Kirmani said. “However, the oxide layer turned out to be a surprisingly good barrier against those as well.”Metal oxide barrier layers for terrestrial and space perovskite photovoltaics.
In addition to making the cells more resilient in space, the researchers also tested how the barrier could provide benefit in more conventional applications. They then exposed the perovskite solar cells to an uncontrolled moisture and temperature environment for several days to mimic storage conditions. The protected cells retained their initial 19% efficiency, while the unprotected cells showed significant degradation, from 19.4% to 10.8%.
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