Engineering formation of 2D on 3D perovskites: characterization and devices performance and stability

• Grant number: 25/07743-6
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: September 01, 2025
• End date: August 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Ana Flávia Nogueira
• Grantee: Murillo Henrique de Matos Rodrigues
• Supervisor: Giulia Grancini
• Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: Università degli Studi di Pavia, Italy
• Associated to the scholarship: 22/16614-7 - Stability and formation dynamics of 2D/3D perovskites interface investigated by in situ techniques, BP.PD

Abstract

The integration of two-dimensional (2D) structures into three-dimensional (3D) perovskites has significantly improved perovskite solar cell efficiency and stability, advancing them toward commercial viability. Incorporating 2D layers within the 3D bulk material enhances structural and environmental stability by acting as barriers against moisture and oxygen, reducing degradation. These 2D layers also passivate defects, minimizing non-radiative recombination, which improves charge carrier lifetime and device performance. Additionally, the presence of 2D structures increases the mechanical robustness of the perovskite film, enhancing resistance to cracking and stress. This study will focus on the role of various cations in forming 2D structures within the bulk material, examining different incorporation strategies and the effects of counterions such as I, Br, and Cl. The materials will be characterized using advanced techniques, including atomic force microscopy (AFM), photoluminescence (PL), and near-field scanning photovoltage microscopy (NSPM). This fellowship provides a valuable opportunity for knowledge exchange between research groups. The techniques and insights gained will be applied to the current research group's work on inverted perovskite solar cells, enhancing understanding of 2D/3D perovskite interfaces. The collaboration will improve the group's capabilities and contribute to advancing solar cell technology, particularly in optimizing the performance and stability of these devices. (AU)