One-Pot Synthesis and Characterization of CuCrS 2 /ZnS Core/Shell Quantum Dots as New Blue-Emitting Sources

In this paper, we introduce a new blue-emitting material, CuCrS /ZnS QDs (CCS QDs). To obtain bright and stable photoluminescent probes, we prepared a core/shell structure; the synthesis was conducted in a one-pot system, using 1-dodecanethiol as a sulfur source and co-ligand. The CCS QDs exhibited...

Full description

Saved in:
Bibliographic Details
Published inMaterials Vol. 16; no. 2
Main Authors Lee, Ho-Kyung, Ban, Ye-Jun, Lee, Hyun-Jong, Kim, Ji-Hyeon, Park, Sang-Joon
Format Journal Article
LanguageEnglish
Published Switzerland 12.01.2023
Subjects
blue emission
quantum dots
photoluminescence
CuCrS2
Online AccessGet full text

Cover

More Information
Summary:In this paper, we introduce a new blue-emitting material, CuCrS /ZnS QDs (CCS QDs). To obtain bright and stable photoluminescent probes, we prepared a core/shell structure; the synthesis was conducted in a one-pot system, using 1-dodecanethiol as a sulfur source and co-ligand. The CCS QDs exhibited a semi-spherical colloidal nanocrystalline shape with an average diameter of 9.0 nm and ZnS shell thickness of 1.6 nm. A maximum photoluminescence emission peak (PL max) was observed at 465 nm with an excitation wavelength of 400 nm and PLQY was 5% at an initial [Cr ]/[Cu ] molar ratio of one in the core synthesis. With an off-stoichiometric modification for band gap engineering, the CCS QDs exhibited slightly blue-shifted PL emission spectra and PLQY was 10% with an increase in initial molar ratio of 2.0 (462 nm PL max). However, when the initial molar ratio exceeded two, the CCS QDs exhibited a lower photoluminescence quantum yield of 4.5% with 461 nm of PL max at the initial molar ratio of four due to the formation of non-emissive Cr S nanoflakes.
ISSN:1996-1944
1996-1944