水溶性蓝色发光锰掺杂碲化镉量子点的合成与性质

Synthesis and Properties of Water-Soluble Blue-Emitting Mn-Alloyed CdTe Quantum Dots.

作者信息

Tynkevych Olena, Karavan Volodymyr, Vorona Igor, Filonenko Svitlana, Khalavka Yuriy

机构信息

Yuriy Fedkovych Chernivtsi National University, Kotsiubynsky Str. 2, Chernivtsi, 58012, Ukraine.

The Scientific Center of Preventive Toxicology, Food and Chemical Safety, Fedkovycha Str. 30, Chernivtsi, 58000, Ukraine.

出版信息

Nanoscale Res Lett. 2018 May 2;13(1):132. doi: 10.1186/s11671-018-2529-y.

DOI:10.1186/s11671-018-2529-y

PMID:29721641

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5931944/

Abstract

In this work, we prepared CdTe quantum dots, and series of CdMnTe-alloyed quantum dots with narrow size distribution by an ion-exchange reaction in water solution. We found that the photoluminescence peaks are shifted to higher energies with the increasing Mn content. So far, this is the first report of blue-emitting CdTe-based quantum dots. By means of cyclic voltammetry, we detected features of electrochemical activity of manganese energy levels formed inside the CdMnTe-alloyed quantum dot band gap. This allowed us to estimate their energy position. We also demonstrate paramagnetic behavior for CdMnTe-alloyed quantum dots which confirmed the successful ion-exchange reaction.

摘要

在本工作中，我们通过水溶液中的离子交换反应制备了尺寸分布窄的CdTe量子点以及一系列CdMnTe合金量子点。我们发现，随着Mn含量的增加，光致发光峰向更高能量移动。到目前为止，这是基于CdTe的蓝色发射量子点的首次报道。通过循环伏安法，我们检测到了CdMnTe合金量子点带隙内形成的锰能级的电化学活性特征。这使我们能够估计它们的能量位置。我们还证明了CdMnTe合金量子点的顺磁行为，这证实了离子交换反应的成功。