Researchers at the Institute of Science and Technology Austria (ISTA) found that these imperfections are actually part of the solar cells’ success.
Unlike traditional silicon‑based solar cells, which need to be almost perfectly pure, perovskites use their flaws to help electric charges travel efficiently through the material.
The research, published in Nature Communications, shows that networks of microscopic defects inside perovskite crystals act like “highways” for electric charges.
When sunlight hits the material, it creates positive and negative charges that need to move through the solar cell to produce electricity.
These defect networks help separate and guide the charges so they don’t recombine too quickly, which boosts efficiency.
According to the scientists Dmytro Rak and Zhanybek Alpichshev, this mechanism explains why perovskite cells perform so well despite being less pure than silicon.
Rak said the team’s work “provides the first physical explanation of these materials while accounting for most if not all of their documented properties.”
Perovskite materials have been studied for about 15 years and are exciting to researchers because they can be made with inexpensive solution‑based methods. They also show promise for use in other technologies, like LEDs and X‑ray detectors.
This discovery may bring scientists one step closer to making cheaper and more powerful solar cells that could be used at large scale in the real world.
By understanding how these internal pathways work, engineers can design better solar technologies that don’t rely on high‑cost manufacturing methods like those used for silicon.
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