Spontaneous alloying of ultrasmall non-stoichiometric Ag-In-S and Cu-In-S quantum dots in aqueous colloidal solutions

Stroyuk O, Raievska O, Solonenko D, Kupfer C, Osvet A, Batentschuk M, Brabec C, Zahn DRT (2021)

Publication Type: Journal article

Publication year: 2021

Journal

RSC Advances Royal Society of Chemistry

Book Volume: 11

Pages Range: 21145-21152

Journal Issue: 34

DOI: 10.1039/d1ra03179a

Abstract

The effect of spontaneous alloying of non-stoichiometric aqueous Ag-In-S (AIS) and Cu-In-S (CIS) quantum dots (QDs) stabilized by surface glutathione (GSH) complexes was observed spectroscopically due to the phenomenon of band bowing typical for the solid-solution Cu(Ag)-In-S (CAIS) QDs. The alloying was found to occur even at room temperature and can be accelerated by a thermal treatment of colloidal mixtures at around 90 °C with no appreciable differences in the average size observed between alloyed and original individual QDs. An equilibrium between QDs and molecular and clustered metal-GSH complexes, which can serve as “building material” for the new mixed CAIS QDs, during the spontaneous alloying is assumed to be responsible for this behavior of GSH-capped ternary QDs. The alloying effect is expected to be of a general character for different In-based ternary chalcogenides.

Authors with CRIS profile

Christian Kupfer Institute Materials for Electronics and Energy Technology (i-MEET) Andres Osvet Institute Materials for Electronics and Energy Technology (i-MEET) Miroslaw Batentschuk Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Additional Organisation(s)

Graduiertenkolleg 2495 Energiekonvertierungssysteme: von Materialien zu Bauteilen (Energy Conversion Systems: From Materials to Devices)

Involved external institutions

L. V. Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine UA Ukraine (UA) Technische Universität Chemnitz DE Germany (DE) Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE)

How to cite

APA:

Stroyuk, O., Raievska, O., Solonenko, D., Kupfer, C., Osvet, A., Batentschuk, M.,... Zahn, D.R.T. (2021). Spontaneous alloying of ultrasmall non-stoichiometric Ag-In-S and Cu-In-S quantum dots in aqueous colloidal solutions. RSC Advances, 11(34), 21145-21152. https://dx.doi.org/10.1039/d1ra03179a

MLA:

Stroyuk, Oleksandr, et al. "Spontaneous alloying of ultrasmall non-stoichiometric Ag-In-S and Cu-In-S quantum dots in aqueous colloidal solutions." RSC Advances 11.34 (2021): 21145-21152.

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