Liquid Crystal Antisolvent Yields Constant Nanocrystals
by Riko Seibo
Tokyo, Japan (SPX) Mar 06, 2025
A analysis group from POSTECH led by Professors Younger-Ki Kim and Yong-Younger Noh has launched an revolutionary strategy for fabricating perovskite nanocrystals (PNCs), key semiconductor supplies for next-generation purposes. The brand new methodology achieves exceptional uniformity and effectivity, promising to beat longstanding challenges in typical synthesis and to spice up the commercialization of optoelectronic gadgets akin to LEDs and photo voltaic cells.
The investigation was carried out by Professors Younger-Ki Kim and Yong-Younger Noh of the Chemical Engineering Division at POSTECH, in collaboration with Ph.D. candidate Jun-Hyung Im, Dr. Myeonggeun Han of Samsung Electronics, and Dr. Jisoo Hong from Princeton College. Their findings have been revealed in ACS Nano, an esteemed worldwide journal within the subject of nanotechnology.
PNCs provide important potential for superior photo voltaic cells and high-efficiency shows resulting from their tunable gentle absorption and emission, which could be exactly adjusted by particle dimension and form by means of the quantum confinement impact. Conventional strategies like hot-injection and ligand-assisted reprecipitation (LARP) incessantly produce particles with inconsistent dimensions due to excessive synthesis temperatures and complex experimental setups. This inconsistency usually necessitates further processing, thereby decreasing general productiveness and limiting industrial purposes.
To deal with these points, the POSTECH group has tailored the LARP approach by substituting the standard antisolvent with a liquid crystal (LC). Liquid crystals possess each fluid-like mobility and crystal-like molecular order, aligning alongside a most popular route outlined by a director to generate elastic forces. When exterior stress is utilized, these forces reorient the molecules and produce important elastic strains. By sustaining all different synthesis circumstances whereas changing the antisolvent with LC, the researchers managed the expansion of PNCs in order that their growth was halted upon reaching the extrapolation size (?) of the liquid crystals, enabling large-scale manufacturing with out further purification steps.
Additional evaluation revealed that the interplay between ligands connected to the PNC surfaces and the rod-like LC molecules enhances ligand packing. This denser association minimizes floor defects and considerably improves the luminescence properties of the nanocrystals.
Professor Younger-Ki Kim defined, “The synthesis methodology developed by our analysis group is extremely suitable with current synthesis methods, akin to ligand trade and microfluidic synthesis, and can improve the efficiency of assorted optoelectronic gadgets, together with LEDs, photo voltaic cells, lasers, and photodetectors.” He additionally said, “This know-how permits the large-scale manufacturing of uniform, high-performance nanocrystals at room temperature, and we anticipate it can assist speed up the commercialization of nanocrystal-based optoelectronic gadgets.”
Funding for this analysis was offered by the Fundamental Analysis Program (Hanwoomul-Phagi Fundamental Analysis) and the Pioneer Program for Promising Future Convergence Expertise of the Nationwide Analysis Basis of Korea (NRF).
Analysis Report:Controlled Synthesis of Perovskite Nanocrystals at Room Temperature by Liquid Crystalline Templates
Associated Hyperlinks
Pohang University of Science and Technology
All About Solar Energy at SolarDaily.com
Trending Merchandise
