Cation Exchange Synthesis of Aliovalent Doped InP QDs and Their ZnSexS1- xShell Coating for Enhanced Fluorescence Properties

Ruizhi Du, Xinyuan Li*, You Li, Yuxi Li, Tailei Hou, Yuemei Li, Chen Qiao, Jiatao Zhang*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

8 引用 (Scopus)

摘要

III-V quantum dots (QDs), in particular InP QDs, have emerged as high-performance and environmentally friendly candidates to replace cadmium based QDs. InP QDs exhibit properties of direct band gap structure, low toxicity, and high mobility, which make them suitable for high-performance optoelectronic applications. However, it is still challenging to precisely regulate the components and crystal structure of InP QDs, especially in the engineered stable aliovalent doping. In this work, we developed our original reverse cation exchange strategy to achieve Cu+doped InP (InP:Cu) QDs at lower temperature. A ZnSexS1-xshell was then homogeneously grown on the InP:Cu QDs as the passivation shell. The as-prepared InP:Cu@ZnSexS1-xcore-shell QDs exhibited better fluorescence properties with a photoluminescence quantum yield (PLQY) of 56.47%. Due to the existence of multiple luminous centers in the QDs, variable temperature-dependent fluorescence characteristics have been studied. The high photoluminescence characteristics in the near-infrared region indicate their potential applications in optoelectronic devices and biological fields.

源语言英语
页(从-至)670-676
页数7
期刊Journal of Physical Chemistry Letters
14
3
DOI
出版状态已出版 - 26 1月 2023

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