Spin-polarizable excitonic luminescence in colloidal Mn2+-doped CdSe quantum dots

被引：182

作者：

Beaulac, Remi ^{[1
]}

Archer, Paul I. ^{[1
]}

Liu, Xinyu ^{[2
]}

Lee, Sanghoon ^{[3
]}

Salley, G. Mackay ^{[1
]}

Dobrowolska, Margaret ^{[2
]}

Furdyna, Jacek K. ^{[2
]}

Gamelin, Daniel R. ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

[2] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[3] Korea Univ, Dept Phys, Seoul 136701, South Korea

来源：

NANO LETTERS | 2008年 / 8卷 / 04期

关键词：

D O I：

10.1021/nl080195p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photoluminescence of colloidal Mn2+-doped CdSe nanocrystals has been studied as a function of nanocrystal diameter. These nanocrystals are shown to be unique among colloidal doped semiconductor nanocrystals reported to date in that quantum confinement allows tuning of the CdSe bandgap energy across the Mn2+ excited-state energies. At small diameters, the nanocrystal photoluminescence is dominated by Mn2+ emission. At large diameters, CdSe excitonic photoluminescence dominates. The latter scenario has allowed spin-polarized excitonic photoluminescence to be observed in colloidal doped semiconductor nanocrystals for the first time.

引用

页码：1197 / 1201

页数：5

共 32 条

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