Time-evolution of photoluminescence properties of ZnO/MgO core/shell quantum dots

被引：23

作者：

Bera, Debasis ^{[1
]}

Qian, Lei ^{[1
]}

Holloway, Paul H. ^{[1
]}

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2008年 / 41卷 / 18期

关键词：

D O I：

10.1088/0022-3727/41/18/182002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In situ and ex situ time-evolution of photoluminescence data during growth of ZnO/MgO core/shell quantum dots (Qdots) were used to study the stability of the green-white (CIE: 0.32, 0.41) luminescence from ZnO defects. The ZnO/MgO Qdots, synthesized by a sol-gel process, exhibited a quantum yield of 13% compared with less than 5% for ZnO Qdots. The growth of ZnO Qdots was arrested and the defect emission was stabilized by formation of the MgO shell. UV-Vis absorption data verified the quantum confinement of ZnO/MgO Qdots. Photoluminescence emission from defects in the ZnO/MgO Qdots was stable similar to 70 days at room temperature.

引用

页数：4

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