Synthesis CdSexS1−x core/shell type quantum dots via one injection methodElectronic supplementary information (ESI) available: Experimental; X-ray absorption spectroscopy measurement; TEM images; XAS structural parameters fitting. See DOI: 10.1039/c0cc04074f

The photoluminescence quantum yield (PL-QY) of ternary colloidal CdSe x S 1− x quantum dots (QDs), which were prepared by a one-injection method, enhances with increasing S content. The possible enhancement mechanism was explored by structural analysis via X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). Both found that the enhancement of PL-QY of ternary CdSe x S 1− x QDs strongly correlated with self-formed core/shell conformation in the non-coordination solution. The photoluminescence quantum yield of ternary colloidal CdSe x S 1− x quantum dots, which were prepared by a one-injection method, enhances with increasing S content. The possible enhancement mechanism was explored by structural analysis via XANES and EXAFS.