Phase transition and corresponding influence on the yellow-orange Mn²⁺ emission of ZnS:Mn²⁺ quantum dots

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• 作者：Lili Yang ; Weiqiang Yang ; Nannan Yang…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：27
• 期：10
• 页码：10504-10509
• 全文大小：1,879 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X
• 卷排序：27

文摘

The Zn_0.09Mn_0.01S quantum dots have been synthesized with one-step hydrothermal method by adding oleic acid. By adjusting reaction temperature and time, the zincblende-to-wurtzite transition has been realized at relatively lower temperature of 190 °C and longer reaction time of 24 h. The effects of phase transition on both Mn2+ emission and defect emission have been investigated in detail. The yellow-orange emission from 4T₁–^{6A₁ transition of Mn2+ ions and blue-green emission originated from defects can be tuned by reaction temperature and time. Along with the phase transition happens in Zn_0.99Mn_0.01S QDs, both the concentration of different species of defects and the corresponding radiative transition channel spontaneously rearranged. The results testified that more defects exist in the Zn_0.99Mn_0.01S QDs with wurtzite structures.}