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[摘要]：The principal methods for the synthesis of highly luminescent coreshell colloidal quantum dots (QDs) of the most widely used CdSe, CdS, ZnSe, and other AIIBVI nanocrystals are reviewed. One-pot versus multistage core synthesis approaches are discussed. The noninjection one-pot method ensures slow, controllable growth of core nanocrystals starting from magic-size seed recrystallization, which yields defect-free cores with strictly specified sizes and shapes and a high monodispersity. Subsequent injection of shell precursors allows the formation of gradient coreshell QDs with a smooth potential barrier for electrons and holes, without strains or interfacial defects, and, as a consequence, a luminescence quantum yield (QY) approaching 100?%. These general approaches can also be applied to semiconductor coreshell QDs other than AIIBVI ones to cover the broad spectral range from the near-UV to IR regions of the optical spectrum, thus displacing fluorescent organic dyes from their application areas. |
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