| Full text | |
| Author(s): |
Freitas, Andre L. M.
;
Caturello, Naidel A. M. S.
;
Tofanello, Aryane
;
Kaneko, Ulisses F.
;
Correa, Lucas E.
;
dos Reis, Ricardo D.
;
Ferreira, Fabio F.
;
Dalpian, Gustavo M.
;
Souza, Jose A.
Total Authors: 9
|
| Document type: | Journal article |
| Source: | MATERIALS CHEMISTRY FRONTIERS; v. 9, n. 3, p. 13-pg., 2024-12-11. |
| Abstract | |
Characteristic photon emissions in low-dimensional hybrid perovskites are strongly related to inherent distortions in the crystal lattice. These cooperative distortions, influenced by organic spacers and the confined BX6 octahedral arrangement, allow for the manipulation and control of the emitted photon energy and its nature. Herein, we observed a complex dynamic where photon emissions at both low and high energies emerge, depending on octahedral distortion and the application of hydrostatic pressure. Our results demonstrated that samples featuring different octahedral sizes and distortions but having a common organic spacer (BA2MAPb2Br7 and BA2MAPb2I7) showed low-energy photon emission attributed to self-trapped excitons (STEs), which can be tuned towards free exciton (FE) states through pressure annealing. Experimental and theoretical results revealed that octahedral distortions in 2D perovskites played a crucial role in controlling emission, disclosing their complex structure and electronic relationship. (AU) | |
| FAPESP's process: | 23/12165-6 - From fundamental properties of multidimensional halide perovskites to energy conversion applications |
| Grantee: | André Luiz Martins de Freitas |
| Support Opportunities: | Scholarships in Brazil - Generation Project |
| FAPESP's process: | 20/09563-1 - Synthesis and characterization of CH3NH3PbX3 perovskite films |
| Grantee: | André Luiz Martins de Freitas |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 19/21656-8 - Big Data methods to tune perovskites to target properties: alloys, defects and doping |
| Grantee: | Fernando Pereira Sabino |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 18/00823-0 - New topological states of matter under extreme conditions |
| Grantee: | Ricardo Donizeth dos Reis |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 23/09820-2 - Materials by design: from quantum materials to energy applications |
| Grantee: | Gustavo Martini Dalpian |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 21/11446-6 - Semiconducting low dimension halide perovskite for solar energy conversion |
| Grantee: | José Antonio Souza |
| Support Opportunities: | Regular Research Grants |