2026-03-10T00:52:10Z https://ynu.repo.nii.ac.jp/oai

oai:ynu.repo.nii.ac.jp:02002083 2025-09-30T05:46:32Z 495:496

Membrane separation of dispersion of PbS colloidal quantum dots with iodide ligands Tanaka, Jun Yokohama National University 横浜国立大学 Ikeda, Seiya Yokohama National University 横浜国立大学 Yoshikuni, Nozomu Yokohama National University 横浜国立大学 10361867 0000-0002-1334-6604 Mukai, Kohki Yokohama National University 横浜国立大学 open access Creative Commons Attribution 4.0 International Colloidal quantum dot Ligand Organic solvent Porous membrane Hansen solubility parameter Nanoparticle filtration We have succeeded in membrane separation to classify PbS colloidal quantum dots (CQDs) with iodide ligands, which have the potential to significantly improve the performance of many optoelectronic devices such as solar cells. CQDs are expected to be applied in various fields due to their unique features; however, a method for mass-producing uniform CQDs has not yet been established, and the high manufacturing costs resulting from small-scale production are hindering social implementation. We have proposed the membrane separation process as an alternative to conventional centrifugation and demonstrated an acceleration and improved efficiency of the separation processes, thereby eliminating the bottlenecks. Size separation of CQDs with iodide ligands (I-CQDs) using membrane filtration has remained particularly challenging due to their inevitable adsorption to the membrane. In this work, I-CQDs were successfully withdrawn to the filtrate without adsorption by dispersing them in a quaternary mixed solvent that satisfies the adsorption-inhibiting conditions proposed in previous studies, which are based on Hansen solubility parameters. Our membrane separation technology will become the basis for the low-cost production of I-CQDs. Elsevier 2025-09-27 2025-09-30 eng journal article VoR http://hdl.handle.net/10131/0002002083 https://ynu.repo.nii.ac.jp/records/2002083 https://doi.org/10.1016/j.memlet.2025.100107 1025 Japan Society for the Promotoion of Science 独立行政法人日本学術振興会 JP25K08505 コロイド型量子ドットによる超格子薄膜の製造技術と新原理太陽電池の創生 2772-4212 Journal of Membrane Science Letters 5 2 5 100107 https://ynu.repo.nii.ac.jp/record/2002083/files/1-s2.0-S2772421225000169-main.pdf application/pdf 3.3 MB 2025-09-30