| Full text | |
| Author(s): |
Bonadio, Ariany
;
Sabino, Fernando P.
;
Freitas, Andre L. M.
;
Felez, Marissol R.
;
Dalpian, Gustavo M.
;
Souza, Jose A.
Total Authors: 6
|
| Document type: | Journal article |
| Source: | Inorganic Chemistry; v. 62, n. 19, p. 12-pg., 2023-05-01. |
| Abstract | |
Stability and maintenance of the crystal structure are the main drawbacks of the application of organic-inorganic perovskites in photovoltaic devices. The Delta T = 62 K robust shift of the structural phase transition observed here allows us to conduct a comprehensive study at room temperature of the tetragonal versus cubic phase on MAPbI3. The absence of the shift in the cubic transition for all-inorganic CsPbI3 samples confirms the importance of both orientation and dynamics of the organic cations. Our results provide a unique opportunity to evaluate the physical properties of both cubic and tetragonal phases of MAPbI3 at the same temperature, eliminating different phonon effects as possible causes for different properties. Besides higher electrical resistivity, the perovskite cubic phase presents a faster charge carrier lifetime than the tetragonal phase and partial PL quenching, pointing toward increased trap-assisted nonradiative recombination. The light absorption coefficient in the cubic phase is larger than the absorption in the tetragonal phase in the green region. (AU) | |
| 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: | 17/02317-2 - Interfaces in materials: electronic, magnetic, structural and transport properties |
| Grantee: | Adalberto Fazzio |
| 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 |
| FAPESP's process: | 21/14422-0 - Computational design of stable halide perovskites: effects of defects, alloys, and pressure |
| Grantee: | Gustavo Martini Dalpian |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 21/10585-2 - Synthesis and physical properties of 0D and 2D halide perovskites |
| Grantee: | Ariany Bonadio |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate (Direct) |
| FAPESP's process: | 18/14181-0 - Synthesis, characterization and computational simulation of hybrid APbX3 (a = CS and CH3NH3; X = i, CL e Br) perovskites |
| Grantee: | Ariany Bonadio |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| 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 |