Ligand Effect in 1-Octanethiol Passivation of InP/ZnSe/ZnS Quantum Dots-Evidence of Incomplete Surface Passivation during Synthesis
- The lack of anionic carboxylate ligands on the surface of InP/ZnSe/ZnS quantum dots (QDs), where zinc carboxylate ligands can be converted to carboxylic acid or carboxylate ligands via proton transfer by 1-octanethiol, is demonstrated. The as-synthesized QDs initially have an under-coordinated vacancy surface, which is passivated by solvent ligands such as ethanol and acetone. Upon exposure of 1-octanethiol to the QD surface, 1-octanethiol effectively induces the surface binding of anionic carboxylate ligands (derived from zinc carboxylate ligands) by proton transfer, which consequently exchanges ethanol and acetone ligands that bind on the incomplete QD surface. These systematic chemical analyses, such as thermogravimetric analysis-mass spectrometry and proton nuclear magnetic resonance spectroscopy, directly show the interplay of surface ligands, and it associates with QD light-emitting diodes (QD-LEDs). It is believed that this better understanding can lead to industrially feasible QD-LEDs.
Verfasserangaben: | Jiyong KimORCiD, Yohan KimORCiD, Kyoungwon ParkORCiD, Christine BoeffelORCiD, Hyung-Seok Choi, Andreas TaubertORCiDGND, Armin WedelORCiD |
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DOI: | https://doi.org/10.1002/smll.202203093 |
ISSN: | 1613-6810 |
ISSN: | 1613-6829 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/36069261 |
Titel des übergeordneten Werks (Englisch): | Small : nano micro |
Verlag: | Wiley-VCH |
Verlagsort: | Weinheim |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Datum der Erstveröffentlichung: | 07.09.2022 |
Erscheinungsjahr: | 2022 |
Datum der Freischaltung: | 29.01.2024 |
Freies Schlagwort / Tag: | colloidal quantum dots; incomplete surface passivation; indium; phosphide; surface chemistry; thiol passivation |
Aufsatznummer: | 2203093 |
Seitenanzahl: | 11 |
Fördernde Institution: | European Union [862410]; Projekt DEAL |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 54 Chemie |
Peer Review: | Referiert |
Publikationsweg: | Open Access / Hybrid Open-Access |
Lizenz (Deutsch): | CC-BY - Namensnennung 4.0 International |