Perovskite nanocrystals synthesis as undergraduate laboratory practice: Methology analysis

Lead halide perovskite nanocrystals (LHP NCs) with the CsPbX₃ structure (X = Cl, Br, or I) exhibit exceptional photoluminescent properties and have attracted extensive attention for various optoelectronic applications. Of our particular interest is their potential in chemical education. The bandgap energies of LHP NCs are tuneable, enabling light emission across the entire visible spectrum (410−700 nm) under UV light. This makes LHP NCs excellent candidates for visually striking demonstrations and appealing synthetic targets for inorganic chemistry laboratory courses that are also tied to modern materials science research. Our work is centered around constructing a lab practice involving synthesis and characterization of LHP NCs. We have attempted the three most popular and feasible methods of synthesis, namely: hot injection, heat-up Ligand Assisted Re-Precipitation (LARP), and water-stimulated phase conversion. Hot injection was chosen as the most viable due to relatively high yield and quality of synthesized CsPbBr3, as shown by UV-Vis absorbance and PL emission spectroscopy. We are now testing the same method for CsPbCl3 and CsPb(Br/Cl)3 synthesis. Assuming similar results, we will produce an affordable, accessible, and engaging lab procedure as well as a visually appealing demonstration of Ligand Field Effect. The poster will feature a short overview of the topic and the theory behind it, possible applications, and several vibrant illustrations. Poster submission was sponsored by Instructor Maximillian Zhan, (Science and Technology Department) and was presented at the New Westminster campus on April 10, 2025, for Student Research Days 2025.