Date:

2025-04-30

Title of Paper:

The effect of core size on the fluorescence emission properties of CdTe@CdS core@shell quantum dots

Journal:

Journal of Luminescence

Summary:

In this work, the effect of core size on the fluorescence emission properties of CdTe@CdS core@shell quantum
dots was investigated under the condition of different shell thickness and pH values. Both CdTe and CdTe@CdS
core@shell QDs were synthesized in aqueous phase by a simple method, whose optical features were char-
acterized by absorption and fluorescence spectra. High resolution transmission electron microscopy (HRTEM)
and X-Ray Diffraction (XRD) were utilized to study the structure and composition of the as-prepared QDs. We
can conclude that a smaller initial core exhibits a greater potential for optimizing both fluorescence intensity
enhancement and red shift. What's more, there is an optimal shell thickness for the strongest fluorescence in-
tensity while a thicker shell contributes to a larger fluorescence red shift. The optimal pH value is 10.5 for the
fluorescence intensity enhancement of the core@shell QDs and a higher pH value is an advantage to expedite the
growth rate of CdS shell.

Co-author:

Jian Zhu, Si-Nan Wang, Jian-Jun Li, Jun-Wu Zhao ⁎

Volume:

199 (2018)

Page Number:

216–224

Translation or Not:

No

Date of Publication:

2018-03-21