Kinetic studies on the formation of various II–VI semiconductor nanocrystals and synthesis of gradient alloy quantum dots emitting in the entire visible range
- 23 April 2012
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 22 (21), 10827-10833
- https://doi.org/10.1039/c2jm16448e
Abstract
From kinetic experiments monitoring the consumption of chalcogenide precursors by 31P NMR, it could be concluded that the formation rates of metal chalcogenides (M–E, M = Cd or Zn and E = Se or S) were in the order of ZnS < ZnSe < CdS < CdSe when one equivalent of metal oleate (M–OA) precursor reacted with one equivalent of trioctylphosphine chalcogenide (TOP–E) precursor. On the basis of the reactivity differences, various amounts of each precursor molecule could be deliberately chosen to tune the structure of the generated QDs and consequently the emission colors in the entire visible range. The excellent photochemical stability of the gradient alloy QDs could provide evidence that a good overall coverage of the shell on the core part significantly reduced defects due to lattice mismatch.Keywords
This publication has 28 references indexed in Scilit:
- Air-Stable All-Inorganic Nanocrystal Solar Cells Processed from SolutionScience, 2005
- One-Pot Synthesis of Highly Luminescent CdSe/CdS Core−Shell Nanocrystals via Organometallic and “Greener” Chemical ApproachesThe Journal of Physical Chemistry B, 2003
- The use of nanocrystals in biological detectionNature Biotechnology, 2003
- Electroluminescence from single monolayers of nanocrystals in molecular organic devicesNature, 2002
- Sorting Fluorescent Nanocrystals with DNAJournal of the American Chemical Society, 2002
- Hybrid Nanorod-Polymer Solar CellsScience, 2002
- CdSe Nanocrystal Rods/Poly(3-hexylthiophene) Composite Photovoltaic DevicesAdvanced Materials, 1999
- Semiconductor Nanocrystals as Fluorescent Biological LabelsScience, 1998
- Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymerNature, 1994
- Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallitesJournal of the American Chemical Society, 1993