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

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.