Optical investigation of CdSe/Zn(Be)Se quantum dot structures: size and Cd composition

被引：4
|
作者：
Gu, Y [1 ]
Kuskovsky, IL [1 ]
Fung, J [1 ]
Neumark, GF [1 ]
Zhou, X [1 ]
Guo, SP [1 ]
Tamargo, MC [1 ]
机构：
[1] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA
来源：
11TH INTERNATIONAL CONFERENCE ON II-VI COMPOUNDS (II-VI 2003), PROCEEDINGS | 2004年 / 1卷 / 04期
关键词：
D O I：
10.1002/pssc.200304223
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The optical properties of CdSe/Zn0.97Be0.03Se and CdSe/ZnSe quantum dots (QDs) are investigated using photoluminescence (PL) and PL excitation spectroscopies. We show that the addition of Be into the barrier enhances the Cd composition and the overall quantum confinement of optically active QDs. The temperature behavior of PL supports such a conclusion. We also show that the room temperature QD PL exhibits a supra-linear dependence on the excitation intensity, which is attributed to the recombination involving relatively strongly localized holes and quasi-free electrons.
引用
收藏
页码：779 / 782
页数：4
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