Tuning Phase Purity in Chiral 2D Perovskites

Author(s):Show less -

Scalon, Lucas ; Brunner, Julius ; Guaita, Maria Gabriella Detone ; Szostak, Rodrigo ; Albaladejo-Siguan, Miguel ; Kodalle, Tim ; Guerrero-Leon, L. Andres ; Sutter-Fella, Carolin M. ; Oliveira, Caio C. ; Vaynzof, Yana ; Nogueira, Ana Flavia

• Document type: Journal article
• Source: ADVANCED OPTICAL MATERIALS; v. N/A, p. 13-pg., 2023-07-27.

Abstract

The introduction of chiral organic spacers in low-dimensional metal-halide perovskites triggers chiroptical activity, which is appealing for spintronic applications. However, a comprehensive understanding of structure formation and the ability to control phase purity in such materials have yet to be developed. Herein, the impact of processing conditions on the phase purity, microstructure, and chiroptical properties of chiral 2D perovskites is explored. The anisotropic emergence of a 1D perovskite inside the 2D matrix and its dependence on the organic cation chirality, solvent, and thermal annealing conditions are shown. By controlling these parameters, the in-plane conductivity of the films is nearly doubled. Furthermore, it is demonstrated, for the first time, that solvent choice and the spatial configuration of the organic cation can have an impact on the residual lattice strain and the energetic disorder of the system. The fundamentals presented here can help to improve the film deposition methods for low-dimensional chiral perovskites, offering strategies to control phase purity. (AU)

• FAPESP's process: 21/12104-1 - Unveiling the role of chiral organic spacers on the structural, photophysical, and electronic properties of 2D and 2D/3D perovskite structures
• Grantee: Lucas Scalon
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• FAPESP's process: 21/01357-6 - Hybrid perovskite solar cells investigated in operando by synchrotron radiation techniques
• Grantee: Rodrigo Szostak
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/21401-7 - Multi-User Equipment approved in grant 2017/11631-2: cluster computational de alto desempenho - ENIAC
• Grantee: Juarez Lopes Ferreira da Silva
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 20/04406-5 - Perovskite solar cells from easy, cheap and green sources: a synergistic approach for the synthesis of new organic hole transport materials and the use of more environmental-friendly solvents
• Grantee: Lucas Scalon
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 14/25770-6 - New frontiers in cross-coupling reactions promoted by palladium: combining enantioselective catalysis, C-H activations, new materials and in flux reactions aiming at high efficiency and sustainability in synthetic processes
• Grantee: Carlos Roque Duarte Correia
• Support Opportunities: Research Projects - Thematic Grants