Observation of compositional domains within individual copper indium sulfide quantum dots† †Electronic supplementary information (ESI) available. See DOI: 10.1039/C6NR03269A Click here for additional data file.
نویسندگان
چکیده
The origin of photoluminescence in copper indium sulfide (CIS) quantum dots (Qdots) has previously been ascribed to a donor-acceptor pair (DAP) recombination, with a crystal lattice defect implicated as the origin of the donor state. In this study, electron energy-loss spectroscopy (EELS) was used to observe defect-rich compositional domains within individual CIS Qdots, supporting a model of defect-state-mediated photoluminescence for these particles, and identifying them as an ideal model system for future study of lattice defects on Qdot properties.
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