Luminescent and Magnetic Properties in Semiconductor Nanocrystals with Radial-Position-Controlled Mn2+ Doping

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• 作者：Boping Yang ; Xingchao Shen ; Huichao Zhang ; Yiping Cui ; Jiayu Zhang
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：August 1, 2013
• 年：2013
• 卷：117
• 期：30
• 页码：15829-15834
• 全文大小：356K
• 年卷期：v.117,no.30(August 1, 2013)
• ISSN：1932-7455

文摘

Colloidal nanocrystals (NCs) with radial-position-controlled doping were synthesized to study the effect of the binding symmetry around Mn²⁺ dopant. For the four samples ZnSe:Mn/ZnSe, ZnSe/ZnS(2 ML):Mn/ZnS(2 ML), ZnSe/ZnS(1 ML):Mn/ZnS(2 ML), and ZnSe:Mn/ZnS(2 ML), which were in sequence of binding asymmetry around Mn²⁺ dopant, their photoluminescent (PL) peak showed gradual red-shift (579 to 599 nm) and the PL lifetime became monotonously shorter (0.57 to 0.31 ms), while, as indicated in the electronic paramagnetic resonance spectra, the hyperfine splitting constant became larger (67.9 to 68.4 G) and the g factor became smaller (2.0076 to 2.005). The relation between the luminescent and magnetic properties of the Mn-doped NCs was discussed.