Near-Infrared Luminescent Ternary Ag3 SbS3 Quantum Dots by in situ Conversion of Ag Nanocrystals with Sb(C9 H19 COOS)3

Chemistry. 2018 Dec 12;24(70):18643-18647. doi: 10.1002/chem.201804800. Epub 2018 Nov 26.

Abstract

Differently from the normal three single precursor method to produce colloidal ternary quantum dots (QDs), herein ternary Ag3 SbS3 quantum dots (QDs) with efficient near-infrared (NIR) luminescence have been prepared by a new facile in situ conversion of Ag nanocrystals (NCs) with a binary Sb/S organic precursor Sb(C9 H19 COOS)3 under low temperature. The unprecedented construction evolution from Ag NCs to Ag3 SbS3 /Ag hetero-structure and final monodisperse Ag3 SbS3 QDs has been demonstrated. These novel Ag3 SbS3 QDs exhibit efficient NIR emission at ≈1263 nm and possess high colloidal stability.

Keywords: NIR luminescence; in situ conversion; liquid synthesis; ternary quantum dots.