Scientists advance novel perovskite solar cell process

By Renewable Energy World A new approach to manufacturing perovskite solar cells addressed previous problems and yielded devices with high efficiency and excellent stability, researchers at the National Renewable Energy Laboratory (NREL) report in the journal Science.

Developing highly stable and efficient perovskites based on a rich mixture of bromine and iodine is considered critical for the creation of tandem solar cells. The two elements, however, tend to separate when exposed to light and heat, the researchers said. This limits the voltage and stability of a solar cell.

The new growth approach can “significantly suppress the phase segregation,” said Kai Zhu, a senior scientist at NREL,

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