◆これにより、LEDから高度なディスプレイ技術までの発光デバイスの開発に新たな可能性が拓けると期待される。研究はペロブスカイトナノクリスタルの理解と利用においてだけでなく、産業応用においても生産プロセスを簡素化する可能性を提供しており、光ベースの技術分野において魅力的な進展となる。
＜関連情報＞
- https://excitonscience.com/news/direct-synthesis-perovskite-superstructures
- https://pubs.rsc.org/en/content/articlelanding/2024/nr/d3nr04285e/unauth
CsPbX3ペロブスカイトナノ結晶集合体の直接合成 Direct synthesis of CsPbX3 perovskite nanocrystal assemblies
Chujie Wang,Sri K. Matta,Chun Kiu Ng,Chang Cao,Manoj Sharma, Anthony S. R. Chesman, Salvy P. Russo and Jacek J. Jasieniak
Nanoscale Published:12 Dec 2023
DOI:https://doi.org/10.1039/D3NR04285E
Abstract
Inorganic CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) possess many advantageous optoelectronic properties, making them an attractive candidate for light emitting diodes, lasers, or photodetector applications. Such perovskite NCs can form extended assemblies that further modify their bandgap and emission wavelength. In this article, a facile direct synthesis of CsPbX3 NC assemblies that are 1 μm in size and are composed of 10 nm-sized NC building blocks is reported. The direct synthesis of these assemblies with a conventional hot-injection method of the NCs is achieved through the judicious selection of the solvent, ligands, and reaction stoichiometry. Only under selective reaction conditions where the surface ligand environment is tuned to enhance the hydrophobic interactions between ligand chains of neighbouring NCs is self-assembly achieved. These assemblies possess narrow and red-shifted photoluminescence compared to their isolated NC counterparts, which further expands the colour gamut that can be rendered from inorganic perovskites. This is demonstrated through simple down-converting light emitters.
