Perovskite solar cells have gained significant attention in recent years due to their high efficiency and low fabrication cost. However, their long-term stability remains a major challenge, as the perovskite layer is highly sensitive to moisture, oxygen, temperature, and UV radiation.

In a recent study, researchers investigated the incorporation of N,N′-bis(salicylidene)-o-phenylenediamine (salophen) — a Schiff base with chelating properties — into MAPbI₃ (methylammonium lead iodide) thin films. The goal was to evaluate how this surface modification could improve the structural stability and performance of the devices.

The films were prepared under ambient conditions and treated with different concentrations of salophen during the antisolvent step. X-ray diffraction analyses revealed that the presence of salophen molecules promoted better crystallization of the perovskite α-phase, eliminating residual PbI₂ and forming a more hydrophobic surface.

Time-resolved photoluminescence measurements showed that salophen passivation facilitated charge-carrier extraction and reduced surface defects, without significantly altering the optical properties of the material. As a result, the perovskite solar cells achieved efficiencies above 18% and demonstrated enhanced stability.http://lnes.iqm.unicamp.br/wp-content/uploads/2025/10/Captura-de-tela-2025-10-08-102546.png

This study highlights the potential of chelating molecules as an effective strategy to improve the durability and performance of perovskite-based solar cells, bringing this technology closer to practical applications.

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The post Published Paper: Can chelatogenic molecules enhance the stability of air-processed MAPbI3 perovskite solar cells? A case study of salophen first appeared on LNES.

The XXII Meeting of the Brazilian Materials Research Society (B-MRS), held from September 29th to October 3rd, 2024, gathered the global materials science community at the Blue Med Convention Center in Santos, São Paulo, Brazil. Organized by the B-MRS and its committee, the event offered a dynamic forum on recent advancements and future directions in materials science and technology, welcoming participants from academia and industry alike.

Our Research Group Highlights:

• Oral Presentation: Andre Fonseca presented a talk titled “Tracking Halide Exchange in 3D/QD Heterojunctions,” exploring the mechanisms of halide dynamics in these complex interfaces.

• Poster Presentations: Notably, Gabriela was awarded the Best Poster Prize at the symposium (AC03 – Nanoscale Imaging of Heterogeneous and Hierarchical Materials with Synchrotron Radiation) and also received the prestigious RSC Poster Prize for her work on “Influence of Co-solvent and Methylammonium Chloride Additive on Low-Dimensional Perovskites for Solar Cells” highlighting the group’s impactful contributions to the field.

We extend our congratulations to all participants and look forward to further collaborations and discoveries sparked by this inspiring meeting.

For more information on the event, please visit the B-MRS Meeting 2024 website.

The post Group’s Participation in the XXII B-MRS Meeting first appeared on LNES.