A research group led by Professor Yehonadav Bekenstein from the Faculty of Materials Sciences and Engineering and the Solid-State Institute at Technion was studying perovskite nanoparticles for their potential to provide a green alternative to toxic lead materials used heavily in electronics. In doing so, they found something unexpected.
The team found on a microscopic level that the nanocrystals moved a hole (damage) through the areas of a structure to self-heal. Surprised by this, the researchers drew up a code to analyze microscopic videos and understand the dynamics and movements within the crystal. The researchers realized that the damaged area, or hole, formed on the surface of the nanoparticles, then moved to energetically stable areas inside, and was finally “spontaneously ejected” out. Researchers explained that through this self-healing process, the nanocrystals essentially reverted back to being undamaged (per Technion).
Researchers with Technion believe that this discovery is a key step toward understanding the processes by which perovskite nanoparticles can heal themselves. The team also thinks that perovskite nanoparticles should be used in solar panels and other electronic devices. The full study, published by Advanced Functional Materials and made available at the Wiley Online Library, is titled “Self-Healing of Crystal Voids in Double Perovskite Nanocrystals Is Related to Surface Passivation.”
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