| 초록 |
Colloidal growth of monodisperse InP quantum dots (QDs) in controlled manner is demanded for display applications which requires high color purity of emitters. Here we report the synthesis of zinc-incorporated InP QDs with remarkably enhanced size uniformity compared to InP QDs. Nuclear magnetic resonance spectroscopy, X-ray photoelectron spectroscopy and mass spectrometry analyses on samples taken during heat-up synthesis show the presence of intermediate metal-phosphorus complexes, especially zinc-phosphorus complex which has lower reactivity than indium-phosphorus complex. Computations on the precursor conversion energetics exhibits the favorable formation of zinc-phosphorus complex and further supports the lower reacitivty, hence results in monodisperse QDs. The combination of experimental and theoretical results would advance the understanding in the synthesis of monodisperse QDs in controlled nucleation and growth events. |
