| Name | Mr. Krittin Poottafai |
|---|---|
| Organization or Institution | University of Florida |
| Topic | Inorganic Chemistry |
| Title | Influence of surrounding medium on photoluminescence and phase behavior of two-dimensional lead iodide perovskites. |
| Author(s) | Krittin Poottafai, Tao Yuwen, Charles J. Hages, Daniel R. Talham |
| Author Institution(s) | University of Florida |
| Abstract | Two-dimensional hybrid lead iodide perovskites have become the main point of attention for many researchers due to their excellent optoelectronic properties. Furthermore, by modulating external pressure, one can tune the optical bandgap of lead iodide perovskite particles, modifying their behavior. For nanoparticles, which possess high surface-to-volume ratio, the contribution of surface interactions to both chemical and physical properties of the particles becomes more important. The interaction of the surrounding medium on the particle surface can change particle surface energy and surface tension(stress), thereby changing the effective pressure on the particle surface. In the case of 2D hybrid lead iodide perovskites, these changes can lead to changes in bandgap energy and average crystal structure of perovskite nanoparticles. In this work, we study the effects of organic suspending solvent on phase transition temperature and photoluminescence wavelength of [C9H19NH3]2PbI4 layered hybrid halide perovskite. The shifts in photoluminescence in different solvents follow the same trend as changes in phase transition temperature, suggesting that changes in both properties are the result of the same phenomenon. |
