Synthesis And Optical Properties Of AgInS2/ZnS QDs In Solution And In PLMA
- Ternary semiconductors quantum dots (t-QD) are Cd-free core-only or core-shell semiconductor nanocrystals with a core made from I-III-VI group elements like Cu-In-S (CIS) or Ag-In-S (AIS). To enhance the PL quantum yield (PL QY) and prevent material deterioration and oxidation, these QDs are commonly surface-passivated with ay ZnS shell.
CIS and AIS QDs exhibit broad photoluminescence (PL) bands that cover visible spectrum up to the near infrared (NIR), the spectral position of which being tunable by size, chemical composition of the core (ratio of the components), and surface ligand. They show high absorption coefficients, high PL quantum yields (PL QY of up to 70%), and long luminescence lifetimes in the order of a few hundred nanoseconds that make them promising materials for a broad variety of applications. This makes them interesting alternatives for Cd-based QDs for applications as optically active components in solar concentrators or solar cells, light emitting diodes (LED) orTernary semiconductors quantum dots (t-QD) are Cd-free core-only or core-shell semiconductor nanocrystals with a core made from I-III-VI group elements like Cu-In-S (CIS) or Ag-In-S (AIS). To enhance the PL quantum yield (PL QY) and prevent material deterioration and oxidation, these QDs are commonly surface-passivated with ay ZnS shell.
CIS and AIS QDs exhibit broad photoluminescence (PL) bands that cover visible spectrum up to the near infrared (NIR), the spectral position of which being tunable by size, chemical composition of the core (ratio of the components), and surface ligand. They show high absorption coefficients, high PL quantum yields (PL QY of up to 70%), and long luminescence lifetimes in the order of a few hundred nanoseconds that make them promising materials for a broad variety of applications. This makes them interesting alternatives for Cd-based QDs for applications as optically active components in solar concentrators or solar cells, light emitting diodes (LED) or as reporter in the life sciences.
Here we present a systematic spectroscopic study of a set of AIS/ZnS QDs synthesized in water, size selected by fractioned precipitation, and after ligand exchange in an apolar organic solvent as well as embedded in a polymer. The latter was achieved by a photochemically initiated polymerization. The PL properties of these AIS/ZnS including PL QY and the PL decay kinetics assessed in different matrices/environments are shown and discussed as well as possible applications in energy conversion.…
Autor*innen: | Lorena Dhamo |
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Koautor*innen: | Philip Nickl, A. Rayevskaya, O. Stroyuk, Christian Wuerth, Ute Resch-GengerORCiD, D. Eisenhauer |
Dokumenttyp: | Posterpräsentation |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2019 |
Organisationseinheit der BAM: | 1 Analytische Chemie; Referenzmaterialien |
1 Analytische Chemie; Referenzmaterialien / 1.2 Biophotonik | |
DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
Freie Schlagwörter: | Nanomaterial; Quantum dots; Water synthesis |
Themenfelder/Aktivitätsfelder der BAM: | Chemie und Prozesstechnik |
Veranstaltung: | Tag der Chemie |
Veranstaltungsort: | Berlin, Germany |
Beginndatum der Veranstaltung: | 11.07.2019 |
Enddatum der Veranstaltung: | 11.07.2019 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 28.11.2019 |
Referierte Publikation: | Nein |