What inspired you to pursue this research topic, and how has your understanding of it evolved throughout your PhD journey?
I have always been interested in fundamental research. My PhD project focuses on investigating organic cation localized dynamics in metal halide perovskites (MHPs) using neutron scattering, it aligned perfectly with my interests. At the beginning, my understanding of these dynamics was fragmented from various literatures. As my research progressed, I realized that the organic cation dynamics in this “soft” system are intricately coupled with other internal factors. I have since moved away from an isolated perspective, recognizing that the complex dynamics within the MHP system must be analyzed through a comprehensive and integrated lens to fully understand their interconnections and mutual interactions.
Can you describe a key finding or insight from your research that you’re especially proud of—and why it matters in your field?
A significant insight from my work, obtained through an in-situ illuminance inelastic neutron scattering study on MAPbBr3, indicates that the vibrational dynamics of organic cations are influenced by illumination conditions. Although this research is in its early stages, it provides direct experimental evidence that the dynamics of organic cations are actively involved in the photoelectric conversion process of MHPs, rather than being independent of the inorganic sublattice. This finding establishes a foundational validation for future in-situ illuminance neutron scattering experiments, paving the way for deeper fundamental characterization of these materials.
How do you hope your research will be used or built upon after your defense—whether in academia, industry, or society at large?
My work provides a systematic characterization of the localized dynamics of organic cations in MHPs. I hope this offers a foundational framework and a new perspective for analyzing these high-performance materials. By enabling researchers to view MHP as a complex, inter-coupled system, my research aims to facilitate a more holistic understanding of the fundamental principles governing their performance and existing commercializing challenges. Ultimately, I hope these insights will assist in the rational design of future materials.
What role has SwedNess played in your journey?
SwedNess has been very important in my journey, providing both the necessary funding and education in neutron scattering. It offered a good platform for exchange with other researchers in the field. Furthermore, participating in international learning opportunities and hands-on training with other SwedNess students has not only advanced my professional skills but also fostered great friendships and memorable experiences.
Thesis: Localized dynamics of organic cations in metal halide perovskites
