...
首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Manipulation of Carrier-Mn~(2+) Exchange Interaction in CdTe/CdSe Colloidal Quantum Dots by Controlled Positioning of Mn~(2+) Impurities
【24h】

Manipulation of Carrier-Mn~(2+) Exchange Interaction in CdTe/CdSe Colloidal Quantum Dots by Controlled Positioning of Mn~(2+) Impurities

机译:通过控制Mn〜(2+)杂质的位置来操纵CdTe / CdSe胶体量子点中的载体Mn〜(2+)交换相互作用

获取原文
获取原文并翻译 | 示例
           

摘要

Intentional inclusion of manganese ions (Mn~(2+)) into colloidal quantum dots (CQDs) with precise positioning at a substitution lattice site provides a way to explore the interaction between photogenerated species (exciton, electron, hole) and Mn~(2+) spin states. We investigated the influence of Mn~(2+) impurity on the optical properties of CdTe/CdSe CQDs. Host CQDs exhibit a quasi-type-II characteristic, with asymmetric derealization of the carriers over the entire core/shell structure. Mn~(2+) ions were precisely embedded either at the core or at the shell, using controlled layer-by-layer growth. Optical measurements carried out at cryogenic temperatures revealed a change in radiative lifetime, induced circular polarization, and energy split of exciton band-edge emission in the absence of an external magnetic field, when the Mn~(2+) ions were situated within the core. The results suggest the existence of a significant hole—Mn~(2+) exchange interaction and demonstrate a way to control band-edge optical properties in confined systems.
机译:将锰离子(Mn〜(2+))故意包含在胶体量子点(CQDs)中,并精确定位在取代晶格位点上,为探索光生物种(激子,电子,空穴)与Mn〜(2)之间的相互作用提供了一种方法+)自旋状态。我们研究了Mn〜(2+)杂质对CdTe / CdSe CQDs光学性能的影响。宿主CQD表现出准II型特征,在整个核/壳结构上载流子不对称地实现去磁。使用受控的逐层生长,将Mn〜(2+)离子精确嵌入核或壳中。在Mn〜(2+)离子位于核内的情况下,在低温下进行的光学测量表明,在没有外部磁场的情况下,辐射寿命,诱导的圆极化和激子能带边缘发射的能级发生了变化。 。结果表明存在显着的空穴-Mn〜(2+)交换相互作用,并证明了在受限系统中控制带边缘光学性质的方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号