A new type of solar technology has seemed promising in recent years. Halide perovskite solar cells are both high-performing and low-cost for producing electrical energy – two necessary ingredients for any successful solar technology of the future. But new solar cell materials should also match the s
In newly published research, a team led by Juan-Pablo Correa-Baena, assistant professor in the School of Materials Sciences and Engineering at Georgia Tech, shows that halide perovskite solar cells are less stable than previously thought. Their work reveals the thermal instability that happens within the cells’ interface layers, but also offers a path forward toward reliability and efficiency for halide perovskite solar technology.
“Our concern was that during long periods of solar cell operation the reconstruction of the interfaces would continue,” said Correa-Baena. “So, we sought to understand and demonstrate how this process happens over time.” Finally, the team correlated the changes in structure and optoelectronic properties with the differences in the solar cells’ efficiencies. They also studied the changes induced by high temperatures in two of the most used cations and observed the differences in dynamics at their interfaces.
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