Photoluminescence Spectra and Dynamics of Al3+- and Ag+-Doped CdS Nanocrystals
Photoluminescence Spectra and Dynamics of Al3+- and Ag+-Doped CdS Nanocrystals
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DOI：
10.1143/jpsj.79.093706
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发表时间：
2010-08
影响因子：
1.7
通讯作者：
A. Ishizumi;Y. Kanemitsu
中科院分区：
文献类型：
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作者：
A. Ishizumi;Y. Kanemitsu
报道了Al 3+和Ag +掺杂的CdS/ZnS核壳纳米晶（CdS：Al，Ag NCs）的光致发光（PL）光谱和动力学. CdS：Al，Ag纳米粒子除了具有激子发光外，还具有较宽的发光带.宽PL的峰值能量随着纳米碳尺寸的减小而向更高的能量移动。这种尺寸依赖性与激子PL峰能量非常相似。我们的研究结果表明，在CdS：Al，Ag纳米粒子中的广泛的PL表现为自由结合的PL。我们讨论的机制的施主-受主对PL的大小与施主电子玻尔半径相当的NC。
We report on the photoluminescence (PL) spectra and dynamics of Al 3+ - and Ag + -doped CdS/ZnS core/shell nanocrystals (CdS:Al,Ag NCs). The CdS:Al,Ag NCs show a broad PL band in addition to an exciton PL. The peak energy of the broad PL shifts to higher energies with decreasing size of the NCs. This size-dependence is very similar to that of the excitonic PL peak energy. Our findings suggest that the broad PL in the CdS:Al,Ag NCs behaves as free-to-bound PL. We discuss the mechanism of the donor-acceptor-pair PL in NCs with sizes comparable to the donor electron Bohr radius.