Photoluminescence from ZnS/CdS:Mn/ZnS quantum well quantum dots

被引：18
|
作者：
Qian, L. [1 ]
Bera, D. [1 ]
Holloway, P. [1 ]
机构：
[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32601 USA
来源：
APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 09期
关键词：
D O I：
10.1063/1.2889446
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Enhanced photoluminescence is reported from ZnS/CdS:Mn/ZnS quantum well quantum dots (QWQDs) prepared with a reverse micelle process. Compared to CdS:Mn/ZnS core/shell quantum dots, the QWQDs exhibited a much stronger Mn(2+) (4)T(1)-(6)A(1) yellow emission and the quantum yield (QY) was increased from 9% to 45%. This increased QY for QWQDs was postulated to result from the quantum well structure suppressing nonradiative relaxations from the Auger recombination at short times and reduced energy transfer between the Mn(2+) dopants at longer times. (c) 2008 American Institute of Physics.
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