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

Nanoscale Research Letters

Svitlana Filonenko¹  Volodymyr Karavan²  Igor Vorona³  Olena Tynkevych⁴  Yuriy Khalavka⁴ 

[1] L. V. Pisarzhevskii Institute of Physical Chemistry of National Academy of Sciences of Ukraine;The Scientific Center of Preventive Toxicology, Food and Chemical Safety;V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine;Yuriy Fedkovych Chernivtsi National University;

关键词: Quantum dots;    Cadmium telluride;    Manganese;    Alloying;    Thioglycolic acid;   

DOI  :  10.1186/s11671-018-2529-y

来源: DOAJ

【 摘 要 】

Abstract In this work, we prepared CdTe quantum dots, and series of Cd1-xMnxTe-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 Mn2+ 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 Cd1-xMnxTe-alloyed quantum dot band gap. This allowed us to estimate their energy position. We also demonstrate paramagnetic behavior for Cd1-xMnxTe-alloyed quantum dots which confirmed the successful ion-exchange reaction.

【 授权许可】

Unknown