(765e) Solution-Based Synthesis of Cesium Bismuth Halide Perovskite Nanocrystals for Optoelectronic Applications

Nelson, R. D. - Presenter, Iowa State University
Verburg, A., Iowa State University
Panthani, M. G., Iowa State University
Hadi, A., Iowa State University
Lead halide perovskite materials, such as methylammonium lead iodide, are interesting for a variety of optoelectronic applications. However, halide perovskites suffer from instability upon exposure to atmospheric conditions, thus much research in the area seeks to improve their stability. Bismuth halide perovskites are a potential alternative that are relatively unexplored, but have promising initial performance and are predicted to have similar properties to lead-based perovskites.

This work reports the synthesis of cesium bismuth halide perovskite nanocrystals using solution-based methods. The Bi-perovskite nanocrystals show improved phase-stability compared to Pb-based perovskite nanocrystals. Transmission electron microscopy and X-ray diffraction were used to characterize nanoparticle morphology and crystal structure. Absorbance and photoluminescence measurements of these nanocrystals reveal tunable optical properties. These Bi-based perovskite nanocrystals have potential for high performance, stable, and non-toxic solution-processable optoelectronics.