Speaker
Description
Over the past decade, hybrid organic-inorganic halide perovskites have enabled remarkable advances in the performance of solar cells [1] and light-emitting diodes [2]. However, their commercial implementation remains limited by stability issues, structural defects, [3] and the use of toxic solvents in conventional solution-based processing. In this context, our group leverages in-situ synchrotron-based techniques, such as GIWAXS, SAXS/WAXS, PDF analysis, and other scattering methods to reveal the structural and chemical mechanisms governing formation, performance and stability of these materials. [1-4] Understanding these real-time dynamics during different treatments (e.g. temperature, humidity and radiation) is crucial to unlocking novel processing routes, such as solvent-free melt-processing.
In this talk, we focus on the use of in-situ Grazing-Incidence Wide-Angle X-ray Scattering (GIWAXS) to track structural transformations and crystallographic orientation in two-dimensional halide perovskite films during controlled thermal treatments. Using synchrotron radiation, we monitor melting, crystallization pathways, and thermal degradation in real time. These measurements reveal how processing conditions determine both the final crystal orientation and the onset of material degradation.
Building on these insights, we analyze the temperature-dependent structural evolution, the possible texturization during recrystallization, and the specific pathways leading to degradation. By correlating thermal history with the final structural order and stability of the films, this work provides guidelines for processing well-oriented and stable halide perovskite thin films for next-generation optoelectronic devices.
References
[1] Ruggeri, E.; Anaya, M.* et al., Adv. Mater., 34, 2202163 (2022).
[2] Ramos, S. et al., RSC Adv., 15, 28181-28190 (2025).
[3] Iqbal, A. N.; Anaya, M.* et al, Adv. Mater, 36, 2307508 (2024).
[4] Avila, E.; Salway, H.; Anaya, M* et al., Matter, 7, 4319-4331 (2024).