Aqueous synthesis of highly monodispersed thiol-capped CdSe quantum dots based on the electrochemical method

摘要: Abstract A facile green approach is developed to control the growth regime in aqueous synthesis of CdSe semiconductor quantum dots (QDs) based on electrochemistry method. The low temperature and slow injection Se precursors are used prolong diffusion controlled stage thus suppress Ostwald ripening during nanocrystal growth. experimental results show that a concentration precursor would definitely influence procedure. narrow absorption peaks UV–visible spectra, as well transmission electron microscopy images indicate as-prepared QDs have good monodispersity. high-resolution (HRTEM) powder X-ray diffraction (XRD) pattern suggest high crystallinity cubic structure. exhibit fluorescence QYs about 30% without any postpreparative treatment over broad spectral range 560–660 nm, which could be further broadened by long-term refluxing. current work suggests electrochemical method an attractive high-quality II–VI at large scale.