Guanidinium Substitution Improves Self-Healing and Photodamage Resilience of MAPbI3
Pallavi Singh, Davide Raffaele Ceratti, Yahel Soffer, Sudipta Bera, Yishay Feldman, Michael Elbaum, Dan Oron, David Cahen, Gary Hodes · 2024
Read Guanidinium Substitution Improves Self-Healing and Photodamage Resilience of MAPbI3 by Pallavi Singh, Davide Raffaele Ceratti, Yahel Soffer, Sudipta Bera, Yishay Feldman, Michael Elbaum, Dan Oron, David Cahen, Gary Hodes (2024) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-11613547.txt.
Description
Pallavi Singh and co-authors show that swapping in a certain ion makes a solar-cell material heal its own light damage faster, in a 2024 paper. The material is a halide perovskite, a crystal family prized for cheap solar cells and lights, and already known for self-healing. Real devices, though, use mixed recipes rather than the pure forms studied before, so the team tested healing in a mixed crystal used widely for such devices.
Replacing at least 15 percent of one building block, methylammonium, with guanidinium or acetamidinium sped up recovery after damage. A same-sized stand-in, dimethylammonium, changed nothing, so size alone is not the cause. The authors link the speed to strain inside the crystal, the swapped ion's electric tilt, and hydrogen bonds it forms. Fast self-repair matters because a device that heals overnight or between uses lasts far longer.
Catalog record
| CREATOR | Pallavi Singh, Davide Raffaele Ceratti, Yahel Soffer, Sudipta Bera, Yishay Feldman, Michael Elbaum, Dan Oron, David Cahen, Gary Hodes |
|---|---|
| YEAR | 2024 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 41 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |