Electron‐Beam Enables Spatially Resolved Defect‐Mediated Work Function Modulation in FAPbI3 Perovskite Thin Films
Hyeonho Park, Seung‐Gu Choi, Jae‐Hwan Kim, Dong‐Jun Lee, Sung‐Kwang Jung, Gwanghee Lee, HongSeok Kim, Kyung‐Hwan Jin, Jin‐Wook Lee, Seong Heon Kim · 2026
Read Electron‐Beam Enables Spatially Resolved Defect‐Mediated Work Function Modulation in FAPbI3 Perovskite Thin Films by Hyeonho Park, Seung‐Gu Choi, Jae‐Hwan Kim, Dong‐Jun Lee, Sung‐Kwang Jung, Gwanghee Lee, HongSeok Kim, Kyung‐Hwan Jin, Jin‐Wook Lee, Seong Heon Kim (2026) 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-13583094.txt.
Description
Hyeonho Park and co-authors show that an electron beam can tune the energy levels of a perovskite film point by point, in a study from 2026. Perovskite films are a hot material for solar cells and light devices. Setting their Fermi level in a uniform, controlled way across a surface has stayed hard, which limits device design.
Shining an electron beam on the film plants iodine rich defects at the surface. Those defects pull electron density away from lead and iodine sites and shift the surface toward a hole loving state. Changing beam voltage and exposure time moved the work function in a steady, systematic way. A point by point tuning tool of this kind could let engineers write energy patterns into a film for advanced devices.
Catalog record
| CREATOR | Hyeonho Park, Seung‐Gu Choi, Jae‐Hwan Kim, Dong‐Jun Lee, Sung‐Kwang Jung, Gwanghee Lee, HongSeok Kim, Kyung‐Hwan Jin, Jin‐Wook Lee, Seong Heon Kim |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 29 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |