Issue 18, 2015

Highly luminescent CuGaxIn1−xSySe2−y nanocrystals from organometallic single-source precursors

Abstract

The solution-based thermolysis of the organometallic single-source precursors [(iPr3PCu)4(MeGa)4S6] (1) and [(iPr3PCu)4(MeIn)4Se6] (2) is investigated. Multinary semiconductor nanocrystals with sizes in the range of 3–10 nm are obtained by a simple heating-up process in a solvent mixture of long-chain alkyl thiols and amines. The thiols also serve as a sulfur source and capping ligand for the nanoparticles. By mixing 1 and 2, nanocrystal compositions in the range from CuGaS2 to CuInSSe are accessible. Surface passivation of the nanocrystals with ZnS results in high stability and bright photoluminescence (PL). PL maxima are observed in the spectral range between 600 and 800 nm, depending on the size and composition of the nanocrystals. The highest PL quantum yields exceed 50% and are observed for a gallium to indium ratio of 1 : 5.

Graphical abstract: Highly luminescent CuGaxIn1−xSySe2−y nanocrystals from organometallic single-source precursors

Supplementary files

Article information

Article type
Paper
Submitted
10 Dec 2014
Accepted
30 Mar 2015
First published
10 Apr 2015

J. Mater. Chem. C, 2015,3, 4657-4662

Highly luminescent CuGaxIn1−xSySe2−y nanocrystals from organometallic single-source precursors

O. Kluge, I. J. Plante, M. Diab, M. Volokh, A. Teitelboim and T. Mokari, J. Mater. Chem. C, 2015, 3, 4657 DOI: 10.1039/C4TC02842B

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