| Full text | |
| Author(s): |
Clemente da Silva Filho, Jose Maria
[1]
;
Villegas Borrero, Nelson Fabian
[1]
;
Viana, Gustavo Alexandre
[1]
;
Merlo, Rafael Borges
[1]
;
Marques, Francisco Chagas
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Estadual Campinas, Gleb Wataghin Inst Phys, BR-13083859 Campinas, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Crystal Growth & Design; v. 20, n. 3, p. 1531-1537, MAR 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Lead iodide (PbI2) is a precursor for the preparation of the organolead iodide perovskite (CH3NH3PbI3), which has been used in the fabrication of highly efficient solar cells. In this work, a novel route for the deposition of PbI2 thin films is performed by rf sputtering a target made from compressed PbI2 powder. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) revealed that the PbI2 films produced were uniform, pinhole-free, polycrystalline, and had low roughness. A small concentration of Pb nanocrystals observed within the films is attributed to differences in the sputtering yield of lead and iodide from the PbI2 target. A dependence of band gap on rf sputtering power was observed, which was associated with a reduction in the concentration of Pb nanocrystals. The PbI2 films were efficiently converted into CH3NH3PbI3 perovskite films through the immersion into a methylammonium iodide (MAI) solution, which also converted the remaining Pb nanocrystals into perovskite. This methodology has the potential to forge the way toward a new method for the fabrication of large-area perovskite solar cells. (AU) | |
| FAPESP's process: | 12/10127-5 - Research and development of nanostructured materials for electronic and surface physics applications |
| Grantee: | Fernando Alvarez |
| Support Opportunities: | Research Projects - Thematic Grants |